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Racing Head Service (RHS) was founded in 1967 as a manufacturer of racing cylinder heads and quickly established itself as an iconic brand on the drag racing and circle...
Racing Head Service (RHS) was founded in 1967 as a manufacturer of racing cylinder heads and quickly established itself as an iconic brand on the drag racing and circle track circuits. A member of the COMP Performance Group, Racing Head Service (RHS) combines its cutting-edge airflow technology with valvetrain knowledge from COMP Cams engineers to create some of the high-flowing, best-performing cylinder heads on the market. Plus, Racing Head Service offers engine blocks, valvetrain components, cylinder head gaskets and hardware, and more. Shop Summit Racing for legendary RHS performance parts today!
Racing Head Service (RHS) was founded in 1967 as a manufacturer of racing cylinder heads and quickly established itself as an iconic brand on the drag racing and circle track circuits. A member of the COMP Performance Group, Racing Head Service (RHS) combines its cutting-edge airflow technology with valvetrain knowledge from COMP Cams engineers to create some of the high-flowing, best-performing cylinder heads on the market. Plus, Racing Head Service offers engine blocks, valvetrain components, cylinder head gaskets and hardware, and more. Shop Summit Racing for legendary RHS performance parts today!
These RHS LS bare race blocks are designed to meet the needs of today's high performance engine builders and racing enthusiasts. These blocks are available in standard and tall deck height combinations and are engineered for maximum clearance around a 4.600 in. stroke crankshaft. With their unique design, RHS engineers were able to minimize windage in the rotating assembly, leading to superior engine lubrication at higher rpm. To make them friendly for existing race applications, these blocks contain both factory and motor plate race mounts for Gen I, II, III, and IV engines. RHS LS bare race blocks each receive a CT scan to ensure maximum performance and consistency. Standard features include: * Designed from aircraft-quality A357-T6 aluminum * Siamese cast bore walls (4.125 in. or 4.165 in. diameter) with press-in cast iron sleeves * Machined with 55mm cam bearing journal * Available in standard (9.240 in.) and tall (9.750 in.) deck heights with beefy deck thicknesses (.500 in. standard/.750 in. tall deck); standard (5.87 in.) and tall (6.38 in.) deck cylinder sleeves are available * 6 head bolt design with full water jacket around the cylinders' walls; large windows in the valley allow access to an inboard 6th head bolt * Block design includes large front and rear AN-12 side feeds for serious dry sump setups * Material for oversized lifters with lifter bosses that are designed to clear tie bar style lifters
Not Yet Reviewed
$6,575.95
RHS LS cathedral port sheet metal intake manifolds provide race-developed technology for the street. They offer great aesthetics often associated with high-budget race engines. These fabricated manifolds are the perfect way to complete your engine—from each high-strength and durable TIG weld to the clean sheet metal bends and contoured runners. They don't just look good; they will help your engine achieve peak potential. Features of RHS LS cathedral port sheet metal intake manifolds include: * Black anodizing with a textured finish * Scalloped fuel rails further set this intake apart * Excellent performance in high-rpm naturally aspirated engines, as well as boosted applications * Big plenum, short runner design optimal performance * High-quality, durable construction ensures great fitment and reliability * 3mm thick aluminum construction resists flexing * Tested to over 25 psi of boost * Includes billet aluminum fuel rails, fittings, hardware, and gaskets
Not Yet Reviewed
$618.95
RHS intake manifold spacers allow you to use standard-style intakes with RHS Tall Deck race blocks. These spacers are CAD-designed by the engineers at RHS and CNC-machined to strict tolerances to fit your tall decks. RHS intake manifold spacers feature a lightweight, scalloped design that provides rigidity and function without adding significant weight. Installation hardware and a spacer-to-head gasket are included.
( 1 )
$319.95
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$325.95
Racing Head Service offers main cap dowel pins for a variety of LS-based engine applications. The pins are designed to locate the main caps to the block on an RHS race engine.
Not Yet Reviewed
$8.95
RHS piston oiler kits bolt to the underside of the RHS LS race blocks, keeping pistons lubricated for optimal performance even during the most demanding racing conditions. They are built from a 100 percent billet alloy steel body and feature furnace-brazed construction. These components are manufactured at an OEM-quality level, ensuring precise fitment to the RHS LS race block. All oilers are bench-tested and qualified for angular spray pattern accuracy, proper flow, and leakage.
( 1 )
$740.95
RHS designs their big block Chevy 24-degree carbureted intake manifolds for maximum airflow and power with a 4500 Dominator-style carburetor flange. Engineered to fit most 24-degree style race cylinder heads, RHS took additional efforts to ensure excellent port matching when paired with RHS big block Chevrolet cylinder heads. Available for both short and tall deck blocks, each version utilizes a standard BBC distributor—there's no need for a slip collar distributor or special distributor for tall deck engines. RHS big block Chevy 24-degree carbureted intake manifolds deliver excellent flow, throttle response, and torque for drag racing and marine applications! More product features include: * Single-plane design * Utilizes individual runner dividers for excellent throttle response and exceptional torque * Auxiliary water ports * Integral water crossover * Dual distributor hold-down pads * Ports for water lines provided at all four corners * Also available in EFI versions
Not Yet Reviewed
$473.95
RHS billet main caps are precision CNC-machined steel for complete accuracy. They maximize the mating surface for maximum support. These optimized billet main caps are what your LS engine needs for added strength.
( 1 )
$122.95
RHS camshaft retainer plates are replacement thrust plates designed to fit and to support a greater cam load. The solid bronze plates fit with LS aluminum race blocks. Order the model tailored for your vehicle and engine application.
Not Yet Reviewed
$134.95
RHS cam bearings are the replacements for your LS aluminum race block. They feature steel-backed Babbitt bearing material. When parts wear out, Racing Head Service has what you need to maintain optimum performance.
( 1 )
$11.95
RHS engine cylinder liner sleeves are available in multiple lengths and diameters for individual cylinder applications. The bore sleeves are made of spun cast iron. They are included with the purchase of an RHS standard or tall deck LS bare race block, but are also available here as replacements for worn or damaged originals.
Not Yet Reviewed
$80.95
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$648.95
While installing that new camshaft, RHS camshaft retainer plate seals can help you do the job right by replacing the O-ring seal on your cam retainer plate. Racing Head Service delivers power by design, and their camshaft retainer plate seals are no exception! Verify the fitment to your application when ordering.
( 3 )
$8.95
RHS port plugs are crafted from aluminum and anodized to do their job with style. These plugs are perfect replacement parts for RHS aluminum race blocks.
Not Yet Reviewed
$19.95
These RHS cylinder head parts kits have been assembled with the finest premium components to provide your engine with optimal airflow for maximum engine performance. Features include: * 21-4N stainless steel intake and exhaust valves * COMP Cams valve springs, retainers, and locks * Hardened rocker arm studs for use with roller rocker arms * Pushrod guideplates * Valve seals
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$181.95
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$454.95
RHS main cap nuts are quality components included with a variety of RHS engine blocks and available separately as required. With Racing Head Service (RHS) products, you always get power by design. Order the RHS main cap nuts best suited for your build, rebuild, and restoration applications.
Not Yet Reviewed
$8.95
RHS offers main cap washers for engine block and cylinder head applications. These hardware components come standard with the purchase of RHS race blocks, but are also available separately as replacements for worn or damaged originals.
Not Yet Reviewed
$6.95
RHS main cap studs are quality components included with a variety of RHS engine blocks and available separately as required. With Racing Head Service (RHS) products, you always get power by design. Order the RHS main cap studs best suited for your build, rebuild, and restoration applications.
( 1 )
$21.95
RHS offers main cap bolts, nuts, and studs for engine block and cylinder head applications. This hardware comes standard with the purchase of RHS race blocks, but is also available separately as replacements for worn or damaged original fasteners.
Not Yet Reviewed
$7.95
RHS Pro Action cathedral port aluminum cylinder heads are premium LS1 replacement heads for great power on any performance or stock engine build. They feature factory-correct intake manifold alignment slots—ensuring that the intake manifold ports line up properly with the cylinder head ports to avoid power-robbing misalignment. These heads are manufactured from premium materials and machined to the industry's tightest tolerances. They feature bronze/manganese valve guides for long wear, with particular emphasis placed on holding precision tolerances—allowing the valves to seal securely for more power. All RHS cylinder heads feature patented Clean Cast Technology, a revolutionary process that eliminates casting flaws and promotes a smoother internal surface finish for greater air and coolant flow. These benefits provide more power and cooling, right out of the box. A unique dual-seat spark plug pocket design allows you to use both the factory-style tapered seat spark plugs and also flat seat-style plugs that are available in wider heat ranges for high performance applications. RHS Pro Action cathedral port aluminum cylinder heads are designed for any Chevy LS1-style street performance application. They offer one of the best performance values for aftermarket LS1 heads. Order the specs preferred for your vehicle.
Not Yet Reviewed
$757.95
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$810.95
RHS Stage 1 turbo induction packages maximize horsepower and torque gains for your GM LS1 Cathedral Port engine. The kits include a high-quality black anodized sheetmetal intake manifold, FAST throttle body fuel rails, custom COMP Cams camshaft, and LS6+ beehive valve spring kit. This removes all the guesswork, delivering serious gains without the hassle. Additional details: * Engine top-end kit * Fabricated sheetmetal * Cathedral Port LS1/LS2/LS6 car and truck engines * Package delivers an additional 135 hp on an LM7 5.3 LS with 9 lbs.; and 154 hp on 15 lbs. * Made 689 hp on 9 lbs. and 819 hp on 15 lbs.
Not Yet Reviewed
$1,658.95
RHS Stage 2 turbo LS1 induction packages maximize horsepower and torque gains for your GM LS1 Cathedral Port engine. The kits include a high-quality black anodized sheetmetal intake manifold, FAST throttle body fuel rails, custom COMP Cams camshaft, and beehive dual-valve spring kit. This removes all the guesswork, delivering serious gains without the hassle. Additional details: * Engine top-end kit * Cathedral Port LS1/LS2/LS6 car and truck engines * Package delivers an additional 161 hp on an LM7 5.3 LS with 9 lbs. and 175 hp on 15 lbs. * Made 715 hp on 9 lbs., 840 hp on 15 lbs. * Fabricated aluminum intake with textured black anodized finish
Not Yet Reviewed
$1,845.95
RHS Stage 1 naturally aspirated induction packages maximize horsepower and torque gains for your GM LS1 Cathedral Port engine. Kits include a high-quality black anodized aluminum sheetmetal intake, FAST throttle body fuel rails, and custom COMP Cams camshaft. No springs are required. This removes all the guesswork, delivering serious gains without the hassle. Additional details: * Engine top-end kit * Stage 1 "No Springs Required" induction package for N/A GM LS1/Cathedral Port * Cathedral Port LS1/LS2/LS6 car and truck engines * Package delivers an additional 77 hp on an LM7 5.3 LS. Adds over 1,100 rpm of powerband over the stock LM7 setup
Not Yet Reviewed
$1,425.95
RHS Stage 2 naturally aspirated induction packages maximize horsepower and torque gains for your GM LS1 Cathedral Port engine. Kits include a high-quality black anodized aluminum sheetmetal intake manifold, FAST throttle body fuel rails, custom COMP Cams camshaft, and LS6+ beehive valve spring kit. This removes all the guesswork, delivering serious gains without the hassle. Additional details: * Engine top-end kit * Package delivers an addition 105 hp on an LM7 5.3 LS * Adds over 1,700 rpm of powerband over the stock LM7 setup * Stage 2 induction package for N/A GM LS1/Cathedral Port * Cathedral Port LS1/LS2/LS6 car and truck engines
Not Yet Reviewed
$1,658.95
RHS Pro Action LS3 rectangle port cylinder heads are premium replacement heads that utilize the same architecture as factory. This means all stock components will fit without modification. These heads feature factory-correct intake manifold alignment slots—ensuring that the intake manifold ports line up properly with the cylinder head ports to avoid power-robbing misalignment. RHS manufactures these heads from premium materials and machines them to the industry's tightest tolerances. They're available in bare, assembled, and complete but unassembled models. Features: * Premium bronze/manganese valve guides for long wear with particular focus on precise tolerances on valve seat concentricity * Clean Cast Technology eliminates casting flaws and promotes a smoother internal surface finish for greater air and coolant flow * Dual seat spark plug pocket design allows both factory style tapered seat spark plugs and flat seat style plugs in wider heat ranges
Not Yet Reviewed
$757.95
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$815.95
RHS LS Sprint car gear drive kits provide everything you need to fit a top-of-the-line gear drive kit to your RHS race block-equipped Sprint car. That includes: the front cover, cam gear, idler gear, crank gear, thrust assembly, hardware, O-rings, and degree bushings to tune your valve timing as needed. These components are designed for use with RHS race blocks only.
Not Yet Reviewed
$1,786.95
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