Rhs ls heads

This exclusive, CNC-ported design is cast and machined entirely by RHS. LS-specific heads meanwhile allow next-generation GM Gen V technology and advancements from RHS to retro-fit to LS engines. These improvements include canted valves and a dramatically updated combustion chamber, along with the tallest and straightest ports of any LS head. hornady load data 300 win mag High Velocity Heads, Knoxville, Tennessee. 7,423 likes · 43 were here. HVH can extract more power from most any 4 cycle engine through cylinder head... High Velocity Heads, Knoxville, Tennessee. 7,423 likes · 43 were here.Jun 27, 2019 · It is perfect for engine swaps and builds. Racing Head Service (RHS) has introduced its new Pro Action Rectangle Port Aluminum Cylinder Heads as a premium replacement option. Designed with the same architecture of the factory cylinder head, the new Pro Action head is a spot-on replacement. Nov 06, 2019 · This item: Comp Cams RHS 54240 Pro Action Bare LS1 Cylinder Head $483.95 Permatex 81950 Ultra Slick Engine Assembly Lube, 4 oz. , Red $8.49 ($2.12/Fl Oz) COMP Cams 4758-2 Checking Springs $9.62 rh head ls1 head ls1 cylinder heads ls cylinder heads From the manufacturer Handbuilt LS engines from Mast Motorsports. Complete your engine with front drives, engine controllers and everything in between. madchild LS Land Magazine was one of a series of photographic collections of underage girls created by LS Studio, also known as Ukrainian Angels Studio, from 2001 to 2004. Besides LS Land, other LS Studio collections included LS Island, LS Dreams, L... dr chang plastic surgery deaths RHS Pro Elite LS3 CNC-Ported 6-Bolt Cylinder Heads 54550-03TTS. Cylinder Head, Pro-Elite, Aluminum, Complete, 68cc Chamber, 263cc Intake Runner, CNC Ported, Titanium Intake …Apr 17, 2011 · RHS is the ETP head. They used to be call RHS Pro Elite 210 or 225 series. The flow numbers are the same as they used to be and they have the same specs and flow numbers as the ETP 215 and 235 heads. Attachments RHS 210 Flow Chart.gif 28.8 KB Views: 2,930 RHS 225 Flow Chart.gif 30.5 KB Views: 1,472 GM LS RHS Heads: RHS Pro Elite 3.900" Bore LS7 CNC-Ported Cylinder Heads not only get the best LS rectangular port heads onto all GM LS 5.7L – 6.0L blocks, they also provide up to 100 bolt-on horsepower over stock and feature all the benefits of other RHS LS7 heads. These new Pro Elite LS RHS cylinder heads fit all LS applications down to the ... stanford medical records redwood cityRHS Pro Elite LS3 CNC-ported 6-bolt cylinder heads utilize the popular LS 6-bolt head design to provide more clamping force for high-horsepower or boosted engine builds. This bolt pattern also makes Pro Elite heads compatible with the RHS LS race block, GM LSX block and OEM 4-bolt blocks by simply leaving the bolt holes at the top and bottom ... loveland police department jobs item 7 GM LS3 L92 L76 L96 6.0L 6.2L Cylinder Heads 823 Square Port & Rocker Arms PAIR GM LS3 L92 L76 L96 6.0L 6.2L Cylinder Heads 823 Square Port & Rocker Arms PAIR. ... Trick Flow Specialties Alum CYL Head CNC GM Ls1 65cc A/p 225cc Bare. No ratings or reviews yet---- Used; ARP 134-3601 Head Bolt Kit - Chevrolet Small Block. Rizzle wrote: seems your selected …Racing Head ServiceRHS Pro Elite LS3 CNC-ported 6-bolt cylinder heads utilize the popular LS 6-bolt head design to provide more clamping force for high-horsepower or boosted engine builds. This bolt pattern also makes Pro Elite heads compatible with the RHS LS race block, GM LSX block and OEM 4-bolt blocks by simply leaving the bolt holes at the top and bottom ...RHS Pro Action LS3 Rectangle Port Cylinder Heads 54530-05 Cylinder Head, Pro Action, Aluminum, Complete, Not Assembled, 69cc Chamber, 260cc Intake Runner, Chevy, LS3 Rectangle Port, Each Part Number: RHS-54530-05 Not Yet Reviewed Estimated Ship Date: Nov 21, 2022 (if ordered today) Drop Ship Free Shipping $790.95 Add To Cart Compare Wish ListThese heads are ideal for maximum effort naturally aspirated, big boost forced induction, or nitrous applications. 490cfm at .800! Dart 20 's fully CNC, Manley Stainless Valves, PAC 1248 triple springs, Manley .... home assistant synology zigbee Results 1 - 25 of 82 ... Racing Head Service (RHS) was founded in 1967 as a manufacturer of racing cylinder heads and quickly established itself as an iconic ...It is perfect for engine swaps and builds. Racing Head Service (RHS) has introduced its new Pro Action Rectangle Port Aluminum Cylinder Heads as a premium replacement option. Designed with the same architecture of the factory cylinder head, the new Pro Action head is a spot-on replacement. All factory components easily bolt-on, and it even ...RM 24º Sniper-X 375cc Fully CNC Cylinder Heads ; Reher-Morrison Pro Mod Billet Cylinder Heads . living on a canal boat uk. uzi gun text symbol nasams vs patriot irs stimulus check 2022 sign up. 2004 ford explorer stalls when put in reverse. xxx porn forced raped. early signs of autism in babies. nyc doe ...Racing Head Service (RHS) craigs list las vegas The LQ4/LQ9 are essentially 6.0L, iron LS1s in regards to architecture. They share the same valley cover design, knock sensor locations, cam position sensors and locations, crank reluctor tooth counts, and timing covers . The PRC LS3 cylinder heads porting for customers with.CNC Ported cyl. Heads. 5 Axis CNC Porting Tech. Ford Heads · Holden Heads · Chev Heads · LS Series Heads. PARTS SEARCH ...RHS Pro Action cathedral port aluminum cylinder heads are designed for any Chevy LS1-style street performance application. They offer one of the best ... bedsits to rent gloucester Block Price, all: $5082.00. Being such, RHS has been paying attention to all the innovation going into GM's LS engines over the past few years. To meet the swelling of technology and performance coming out of the LS motors, RHS recently designed a fresh take on the LS engine block for extreme street and racing applications.For both the LS3 and LS7 heads, RHS has a catalog of high performance valvetrain hardware that is certified to take everything that the new heads and blocks are capable of dishing out. While a gifted amateur may occasionally stumble into a decent “off-book” setup, that’s not the way to bet.RHS Pro Elite LS3 CNC-ported 6-bolt cylinder heads utilize the popular LS 6-bolt head design to provide more clamping force for high-horsepower or boosted engine builds. This bolt pattern also makes Pro Elite heads compatible with the RHS LS race block, GM LSX block and OEM 4-bolt blocks by simply leaving the bolt holes at the top and bottom ... canfield sportsman show Oct 24, 2022 · RHS Pro Elite LS3 CNC-ported 6-bolt cylinder heads utilize the popular LS 6-bolt head design to provide more clamping force for high-horsepower or boosted engine builds. This bolt pattern also makes Pro Elite heads compatible with the RHS LS race block, GM LSX block and OEM 4-bolt blocks by simply leaving the bolt holes at the top and bottom ... More items from: Borowski Race Engines, Inc. 700 HP, 408ci Naturally Aspirated LS Street Engine. $19,995.For both the LS3 and LS7 heads, RHS has a catalog of high performance valvetrain hardware that is certified to take everything that the new heads and blocks are capable of dishing out. While a gifted amateur may occasionally stumble into a decent “off-book” setup, that’s not the way to bet. american airlines work from home LS Land Magazine was one of a series of photographic collections of underage girls created by LS Studio, also known as Ukrainian Angels Studio, from 2001 to 2004. Besides LS Land, other LS Studio collections included LS Island, LS Dreams, L...You're going to be WAY better off buying a set of heads fully setup for your application from day one. Buying a fully CNC'ed set of heads with everything included (valves, springs, etc...) will generally run about $1500-$1700 a set.LS Barbie was a collection of photos by Ukrainian Angels Studio, also known as LS-Studio, a child-pornography ring, according to the Computer Crime Research Center.valvetrain, oiling systems, heads, intake and carburetor, and ignition systems. In addition, this book contains a large section on stroker packages. Also featured are the latest street heads from AFR, Dart, RHS, World Products, and other prominent manufacturers. While the design is more than 60 years old, the Racing Head Service (RHS) restaurants closing permanently Jun 07, 2013 · Each cylinder head utilizes the popular LS 6-bolt head design which allows these cylinder heads to be compatible with both the RHS LS race block like we’re using or the GM LSX blocks. The 6-bolt design provides strength and an increased ability to clamp at high capacities, which greatly improves head gasket retention. 3 mag 2016 ... RHS® Pro Elite™ LS7 Cylinder Heads are the aftermarket's first high performance LS-style head to feature a raised intake runner design that ...chiron in pisces 10th house acupressure points for hormonal imbalance For both the LS3 and LS7 heads, RHS has a catalog of high performance valvetrain hardware that is certified to take everything that the new heads and blocks are capable of dishing out. While a gifted amateur may occasionally stumble into a decent “off-book” setup, that’s not the way to bet.This item: Comp Cams RHS 54240 Pro Action Bare LS1 Cylinder Head $483.95 Permatex 81950 Ultra Slick Engine Assembly Lube, 4 oz. , Red $8.49 ($2.12/Fl Oz) COMP Cams 4758-2 Checking Springs $9.62 rh head ls1 head ls1 cylinder heads ls cylinder heads From the manufacturerRHS Pro Action LS Rectangle Port cylinder heads are designed for any high performance or stock application and offer one of the best performance values for aftermarket GM LS Rectangle Port heads. Available fully assembled with .570" or .660" lift valve springs or as a bare head.Driven Racing Oil makes high zinc racing oils, gear oils, break-in oils, hot rod oils, brake cleaner and foaming degreasers - born from Joe Gibbs Racing for ... 4 bedroom houses for sale in barming RHS® LS7 Cylinder Heads are the aftermarket's first high performance LS-style head to feature a raised intake runner design that fits both stock and ...Buying a fully CNC'ed set of heads with everything included (valves, springs, etc...) will generally run about $1500-$1700 a set. If you try and start from scratch building up a set of … horse colors The Best Value in LS Heads - RHS Pro Action LS1 Heads are simply the best bang for the buck LS heads available. Made from premium materials with excellent attention to detail and available with several COMP Cams spring kits, this is the best value in LS heads. Period! Fits 4. 8, 5. 3, 5. 7, 6. 0 and 6. 2L GM LS Engines ; Fit Type: Vehicle SpecificFor both the LS3 and LS7 heads, RHS has a catalog of high performance valvetrain hardware that is certified to take everything that the new heads and blocks are capable of dishing out. While a gifted amateur may occasionally stumble into a decent “off-book” setup, that’s not the way to bet.Racing Head Service (RHS)The GMPP LSX cylinder head is a six bolt head that can be used on C6 ZO6 Corvette LS7 blocks, the GMPP LSX cast iron block or RHS aluminum blocks. Flow number and performance will be the same as the LS7 CNC ported cylinder heads that we use in our 630 horsepower & 660 horsepower C6 ZO6 Corvette engine packages. midjourney private mode Racing Head Service (RHS) RHS Pro Action Chevrolet LS Cathedral Port Cylinder Heads 54240-05 Cylinder Head, Pro Action LS Cathedral Port, Bare, Aluminum, 65cc Combustion Chamber, 0.660 in. Lift Dual Springs, 15 Degree, Chevrolet, LS, Each general hospital molly dies Block Price, all: $5082.00. Being such, RHS has been paying attention to all the innovation going into GM’s LS engines over the past few years. To meet the swelling of technology and performance coming out of the LS motors, RHS recently designed a fresh take on the LS engine block for extreme street and racing applications.7 results ... Cylinder Heads and Components. » Engine Bearings ... Camshaft Bearing - Standard Journal - RHS LS Block - GM LS-SERIES - Each maryland medicaid reimbursement rates 2022 This exclusive, CNC-ported design is cast and machined entirely by RHS. LS-specific heads meanwhile allow next-generation GM Gen V technology and advancements from RHS to retro-fit to LS engines. These improvements include canted valves and a dramatically updated combustion chamber, along with the tallest and straightest ports of any LS head.Features of Fast Browser-Video Downloader, Private Video Saver on PC . Stop worrying about overcharges when using Fast Browser-Video Downloader, Private Video Saver on your cellphone, free yourself from the tiny screen and enjoy using the app on a much larger display.Part Number 54906 Features: Standard deck height (9.240) 5.87" cylinder sleeve length. 3.900" Bore that has been finish honed and is ready for assembly. Block Specifications: • Designed from heavy-duty A357-T6 aluminum material. • 4.125”-4.165” Siamese cast bore walls with press-in spun cast iron liner. RHS Pro Elite LS3 CNC-ported 6-bolt cylinder heads utilize the popular LS 6-bolt head design to provide more clamping force for high-horsepower or boosted engine builds. This bolt pattern also makes Pro Elite heads compatible with the RHS LS race block, GM LSX block and OEM 4-bolt blocks by simply leaving the bolt holes at the top and bottom ...7 mag 2007 ... Is anyone know about RHS cylinder heads? Seems to be good product for the bucks. I just want to be sure that they are not PROCOMP cylinders ... edmi meter 2 days ago · Includes: Disassemble and Assembly of LS7 heads. Clean and Bead Blast entire head (so they look brand new) Performance Valve Job. Resurface Heads (or milling of heads) Upgraded (Extended) Manganese Bronzanium 90 Guides. Stock Titanium Intake Valves Treated and Polished. Ferrea Lightweight LS7 Exhaust Valves. New Valve Seals and machined valve ...You're going to be WAY better off buying a set of heads fully setup for your application from day one. Buying a fully CNC'ed set of heads with everything included (valves, springs, etc...) will generally run about $1500-$1700 a set.This item: Comp Cams RHS 54240 Pro Action Bare LS1 Cylinder Head $483.95 Permatex 81950 Ultra Slick Engine Assembly Lube, 4 oz. , Red $8.49 ($2.12/Fl Oz) COMP Cams 4758-2 Checking Springs $9.62 rh head ls1 head ls1 cylinder heads ls cylinder heads From the manufacturerThese Pro Elite™ Aluminum Cylinder Heads are designed with a 12° valve angle and unique .220" raised intake runners to provide a better line of sight into the cylinders and allow for an improved short turn. Please Call for Availability (931)829-2200 Item Inquiry Tell a Friend ShareThis Facebook Tweet Email Print Description family day trips from pittsburgh 1 ott 2015 ... RHS-12054-02 are these heads any good, or do they need to be worked out of the box?? RHS Pro Action Small Block Chevrolet Cylinder Heads ...Founded in 1967, Racing Head Service™ began exclusively as a manufacturer of racing cylinder heads. Over the years, RHS® grew into an integrated racing ...The Air Strike Cylinder Head is the latest technology for your SBC . The Air Strike 12° Small Block Chevy head is for the standard bore spacing and features. office depot staples merger 2022; how much does a substitute teacher make per day; jegs 350 crate engine. Rhs 14 degree sbc heads. sunshine on a cloudy day temptations . autocpufreq vs ... dame nyc 2020. 12. 17. · Memphis, TN – RHS® introduces its new Pro Elite™ CNC-Port 6-Bolt Cylinder Heads as a premium LS3 performance head, ensuring great power on high horsepower and boosted engine builds. RHS® Pro Elite™ CNC-Port 6-Bolt Cylinder Heads for GM LS3 Engines utilize the popular LS 6-bolt head design, making them compatible with the RHS® LS Race …Jun 07, 2013 · We decided on a set of RHS’s new Pro Elite LS7 CNC-ported cylinder heads. These are truly the aftermarket’s first high performance, LS-style head. These gems also feature a 12-degree valve angle and unique, 0.220-inch raised intake runner design, which provides a better line of sight into the cylinders and allows for an improved short turn. invicta watches for men RHS Pro Elite LS3 CNC-ported 6-bolt cylinder heads utilize the popular LS 6-bolt head design to provide more clamping force for high-horsepower or boosted engine builds. This bolt pattern also makes Pro Elite heads compatible with the RHS LS race block, GM LSX block and OEM 4-bolt blocks by simply leaving the bolt holes at the top and bottom ... It is perfect for engine swaps and builds. Racing Head Service (RHS) has introduced its new Pro Action Rectangle Port Aluminum Cylinder Heads as a premium replacement option. Designed with the same architecture of the factory cylinder head, the new Pro Action head is a spot-on replacement. All factory components easily bolt-on, and it even ...RHS Pro Action Chevrolet LS Cathedral Port Cylinder Heads 54240-06 Cylinder Head, Pro Action LS Cathedral Port, Bare, Aluminum, 65cc Combustion Chamber, 0.570 in. Lift Springs, 15 Degree, Chevrolet, LS, Each Part Number: RHS-54240-06 Not Yet Reviewed Estimated Ship Date: Thursday 11/10/2022 (if ordered today) Drop Ship Free Shipping $734.95 accident on 234 in manassas todaySylvia Walters never planned to be in the food-service business. In fact, before she started Sylvia's Soul Plates in April, Walters was best known for fronting the local blues band Sylvia Walters and Groove City.This pair of valve covers are CNC machined from billet 6061 / 5083 aluminium, they suit Ford Cleveland based cylinders heads, and will fit over most ... black yankees fitted hat LS Barbie was a collection of photos by Ukrainian Angels Studio, also known as LS-Studio, a child-pornography ring, according to the Computer Crime Research Center. how long does it take a shy guy to ask you out RHS Pro Action Chevrolet LS Cathedral Port Cylinder Heads 54240-06 Cylinder Head, Pro Action LS Cathedral Port, Bare, Aluminum, 65cc Combustion Chamber, 0.570 in. Lift Springs, 15 Degree, Chevrolet, LS, Each Part Number: RHS-54240-06 Not Yet Reviewed Estimated Ship Date: Monday 11/7/2022 (if ordered today) Drop Ship Free Shipping $734.95BRODIX CYLINDER HEADS - LS7 - BR7 - 262cc - CNC PORTED - 71cc CHAMBER - 6 BOLT - ASSEMBLED - 1171000 WILL SHIP DIRECTLY FROM MANUFACTURER ESTIMATED SHIP DATE: TBD $2,446.16 Add to Cart Please login to add to Quote. BRODIX CYLINDER HEADS - LS7 - BR7 BS - 285cc - CNC PORTED - 72cc CHAMBER - 6 BOLT - ASSEMBLED - 1178103For both the LS3 and LS7 heads, RHS has a catalog of high performance valvetrain hardware that is certified to take everything that the new heads and blocks are capable of dishing out. While a gifted amateur may occasionally stumble into a decent “off-book” setup, that’s not the way to bet. beach hut hire new forest Racing Head Service (RHS)2019. 6. 27. · The General Motors LS3 engine is a strong, reliable engine that has been used in a lot of vehicles. It is perfect for engine swaps and builds. Racing Head Service (RHS) has introduced its new Pro Action Rectangle Port Aluminum Cylinder Heads as a premium replacement option. Designed with the same architecture of the factory cylinder head, the new …The gen idea for a good performing street engine on pump fuel is 185-195 psi with 200 being max Your #'s are right on target for a hot street engine. Nice balance between all 8 cyl. shows you have good ring, and valve sealing in all 8. To give you some idea's on cyl. psi on diff engines. lead rock singer blonde girlfriend RHS Pro Action LS Rectangle Port cylinder heads are designed for any high performance or stock application and offer one of the best performance values for aftermarket GM LS Rectangle Port heads. Available fully assembled with .570” or .660” lift valve springs or as a bare head.RHS Pro Action Chevrolet LS Cathedral Port Cylinder Heads 54240-06 Cylinder Head, Pro Action LS Cathedral Port, Bare, Aluminum, 65cc Combustion Chamber, 0.570 in. Lift Springs, 15 Degree, Chevrolet, LS, Each Part Number: RHS-54240-06 Not Yet Reviewed Estimated Ship Date: Thursday 11/10/2022 (if ordered today) Drop Ship Free Shipping $734.95 Racing Head Service (RHS) places to get a haircut near me Handbuilt LS engines from Mast Motorsports. Complete your engine with front drives, engine controllers and everything in between.PRC CNC Porting Service - Cathedral Port Heads (Customer Supplied Castings) $ 899.99. PRC CNC Porting Service - Godzilla 7.3LHeads (Customer Supplied Castings) $ PRC LS3, L92, & LSA CNC Cylinder Head Porting $ 899.99. Precision Race Components 2014 5.3L & 6.2L CNC Porting Service $ how long does it take for apple cider vinegar to cure toenail fungus For both the LS3 and LS7 heads, RHS has a catalog of high performance valvetrain hardware that is certified to take everything that the new heads and blocks are capable of dishing out. While a gifted amateur may occasionally stumble into a decent “off-book” setup, that’s not the way to bet.Racing Head Service (RHS) eastern veterinary emergency hospital Part Number 54906 Features: Standard deck height (9.240) 5.87" cylinder sleeve length. 3.900" Bore that has been finish honed and is ready for assembly. Block Specifications: • Designed from heavy-duty A357-T6 aluminum material. • 4.125”-4.165” Siamese cast bore walls with press-in spun cast iron liner. leg bouncing 8 mag 2018 ... RHS Pro Elite LS7 Cylinder Heads are the aftermarket's first high performance LS-style head to feature a raised intake runner design that ...Jul 19, 2019 · This item: RHS 54530-06HCS Pro Action Pre-Assembled LS3 Cylinder Head w/ .570" Lift LS6+ Springs $580.96 OEMTOOLS 25090 Harmonic Balancer Puller Kit, Adjustable 3-Jaw Puller Fits Most Late Model Automobiles & Trucks, Forcing Screw Fits a 3/8” Square Drive, Includes 4 Forcing Rods, 6 Piece $45.00 Proven LS Horsepower. From F-body to Corvette, Sierra to Silverado, G8 to GTO, we carry everything for making power with your LS or Gen V Ride! ... BTR 4-BOLT TO 6-BOLT HEAD STUD CONVERSION KIT - LSX AND RHS BLOCKS - BTR426 $169.99. Add to Cart Please login to add to Quote. ...At Borowski Race Engines, these RHS LS3 heads with our CNC port work go on most of our GM 6.0L block builds. THE HEADS IN THIS AD DO NOT INCLUDE ANY MACHINING. PLEASE CLICK.Racing Head Service (RHS) meril edge Block Price, all: $5082.00. Being such, RHS has been paying attention to all the innovation going into GM’s LS engines over the past few years. To meet the swelling of technology and performance coming out of the LS motors, RHS recently designed a fresh take on the LS engine block for extreme street and racing applications.The LS3 factory head features lightweight hollow steel intake and solid-stem exhaust valves. In stock form, flow bench results have shown flow rates of 296 cfm intake and 208 cfm exhaust, at full valve lift of about .600-plus. This head is intended for blocks that feature a minimum cylinder bore diameter of 4.00 inches.All RHS® cylinder heads feature patented Clean Cast Technology™, ... 2004 & Later LS2/LS3/LS7 Cylinder Head Bolt Kit New GM Kit of 15 bolts for 2004 & later LSX engines 1 kit per cylinder head; order 2 per engine Head bolts are torque to yeild so they... Price: $38.96. Quick view Add to Cart. SKU: 17800568. 2010 ...Racing Head Service (RHS) surgical stapler price Racing Head Service (RHS) RHS® LS7 Cylinder Heads are the aftermarket's first high performance LS-style head to feature a raised intake runner design that fits both stock and ...Edelbrock E-CNC 230 Cylinder Head for LS3 (0) Reviews : Write first review ... 69cc Chamber, 260cc Intake Runner, Chevy, LS3 Rectangle Port Rectangle Port, Each Part Number: RHS -54530-05HCS 5.0 out of 5 stars ( 1 ). Posts: 16. LS9 heads on LS3 block. Good evening from Germany.At Borowski Race Engines, these RHS LS3 heads with our CNC port work go on most of our GM 6.0L block builds. THE HEADS IN THIS AD DO NOT INCLUDE ANY MACHINING. PLEASE CLICK. chrysler 300 tcm problems The Air Strike Cylinder Head is the latest technology for your SBC . The Air Strike 12° Small Block Chevy head is for the standard bore spacing and features. office depot staples merger 2022; how much does a substitute teacher make per day; jegs 350 crate engine. Rhs 14 degree sbc heads. sunshine on a cloudy day temptations ... kingdom hearts final mix pc mods Item description. At Borowski Race Engines, our RHS LS3 heads with our CNC port work go on most of our GM 6.0L block builds. We like them for their price, performance and quality in their 4-bolt head category. And we have a great CNC porting program for them. RHS Pro Action GM LS3 Rectangle Port Aluminum Cylinder Heads have the same ... is pearson vue legit Nov 06, 2019 · The Best Value in LS Heads - RHS Pro Action LS1 Heads are simply the best bang for the buck LS heads available. Made from premium materials with excellent attention to detail and available with several COMP Cams spring kits, this is the best value in LS heads. Period! Fits 4. 8, 5. 3, 5. 7, 6. 0 and 6. 2L GM LS Engines ; Fit Type: Vehicle Specific RHS Pro Action Chevrolet LS Cathedral Port Cylinder Heads 54240-05 Cylinder Head, Pro Action LS Cathedral Port, Bare, Aluminum, 65cc Combustion Chamber, 0.660 in. Lift Dual Springs, 15 Degree, Chevrolet, LS, Each It is perfect for engine swaps and builds. Racing Head Service (RHS) has introduced its new Pro Action Rectangle Port Aluminum Cylinder Heads as a premium replacement option. Designed with the same architecture of the factory cylinder head, the new Pro Action head is a spot-on replacement. All factory components easily bolt-on, and it even ... national guard deployed today