Engines & Engine Parts at Summit Racing

Improved Racing Adjustable PCV and Turbo Oiling Restrictor Valves

Replace your traditional PCV valve with Improved Racing adjustable PCV restrictor valves for better reliability and increased crankcase vacuum. They are perfect for LS engines with aftermarket valley covers that do not have a built-in PCV restrictor like the factory cover, and they can also restrict oil flow to a turbocharger to avoid flooding the turbo. Improved Racing's restrictor valves can be used on their own, replacing traditional PCV valves in naturally aspirated engines, or combined with a check valve to prevent pressurizing the crankcase under boost in turbocharged applications. Features and benefits: * Adjustable PCV restrictor with 5 pre-drilled sizes: -- 2.6mm, 3.0mm, 3.5mm, 4.0mm, 4.5mm -- Plus, a blank disc with a 1mm pilot hole for custom-drilled sizes * Female -6 O-ring boss ports on each end -- Can be adapted to many different fitting types and sizes (male AN, hose barb, quick connect, etc.) * All-aluminum 6061 T-6 construction with black Type II anodized housing * Each plate is laser-marked with the restrictor hole diameter in millimeters * No moving parts for improved durability over traditional PCV valves

Not Yet Reviewed

$19.90

Allstar Performance Oil Restrictors

Cut power loss from windage with Allstar Performance oil restrictors. They're designed to replace the factory oil galley plugs at the back of the block and restrict oil flow to the top end, forcing more oil to the bearings. The restrictors are available in different sizes for various engine applications.

5.0 out of 5 stars ( 3 )

$15.99

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$35.99

Moroso Oil Restrictor Kits

When roller rocker arms are installed, along with a mechanical lifter cam, the amount of oil flow required to the valvetrain is greatly reduced. Installing Moroso oil restrictor kits limits this unnecessary oil flow. These kits reduce the power-robbing windage created from the excess oil draining past the rotating assembly and keeps the oil flowing where it is needed most, the rod and main bearings.

4.38 out of 5 stars ( 21 )

$21.99

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$44.99

Engine Works Oil Restrictors

Engine Works offers oil restrictors for a variety of engine applications from the 1950s and up. Machined from aluminum, they fit in most small and big block Chevy blocks (except Bowtie) at the rear of the block. Simply replace the oil galley plugs (tapping may be required). These restrictors are not for use with hydraulic lifters. An oil restrictor installs in the oil passages of the engine block. It limits the flow of oil to certain parts of the engine. Engine oil lubricates and cools vital engine components. In most cases, more oil usually means the engine will run cooler and last longer. However, in some specific RACING applications, more oil can actually reduce the performance of the engine. When roller rockers and solid lifters are installed, the amount of oil required by the valvetrain is reduced greatly. Installing an oil restrictor kit will limit the oil flow, reducing the windage created from excess oil draining past the rotating assembly. This keeps the oil flowing where it is needed most—to the rod and main bearings.

Not Yet Reviewed

$13.71

COMP Cams Oil Restrictors

When building a high performance engine with a solid or solid roller cam, it's necessary to meter the amount of oil going through the lifters and up to the rocker arms. Too much oil to the top will starve the main and rod bearings and cause engine failure. COMP Cams oil restrictors are easy-to-use parts and should be considered when installing a solid lifter or a solid roller camshaft. Simply screw directly into the oil gallery with no machine work.

Not Yet Reviewed

$27.95

Milodon Oil Flow Restrictor Plugs

Don't let oil go to your head! Milodon oil flow restrictor plugs solve the common high performance engine problem of too much oil in the head area. They restrict approximately 75 percent of the oil to the top end of the engine for better lubrication and prevent oil wastage at the lifters (which will cause windage problems). This also keeps the sump better supplied with oil. These plugs install easily into the back of the block in place of the stock plugs. They're not for use with hydraulic lifters.

1.0 out of 5 stars ( 1 )

$14.95

Stef's Oil Restrictors

Stef's stainless steel oil restrictors fit inside your engine block. They have an 1/4 in. NPT thread and are reusable. These restrictors are compatible with early or late model blocks.

2.0 out of 5 stars ( 1 )

$13.99

ICT Billet Engine Block Oil Restrictor Galley Plug Passage Barbells

ICT oil galley barbells have a "weighty" job to perform. Often overlooked, but very much needed, these oil diverter valves fit in the back of your LS engine block and are essential to the oil pressure circuit. Little things may cause a big headache; for your build, replace the plastic barbell with a new one from ICT Billet.

5.0 out of 5 stars ( 1 )

$21.99

Trick Flow® Cylinder Head Replacement Components for Ford 4.6L/5.4L 2V

These Trick Flow Cylinder Head Replacement Components are here to help, if you should ever need to repair your cylinder heads. These parts are designed for Trick Flow Heads only!

4.5 out of 5 stars ( 2 )

$10.99

Turbosmart OPR V2 Oil Pressure Regulators

Turbosmart OPR V2 turbocharger oil pressure regulators provide rock solid oil pressure from a simple, inline return-less regulator that includes a serviceable and replaceable built-in 44-micron stainless steel mesh oil filter, which provides another layer of defense against debris in your engine oil damaging your turbocharger. The OPR V2s achieve target oil pressure through Turbosmart's patent pending flow control strategy, delivering a laminar flow of oil to your turbocharger, no matter the base engine oil pressure or temperature. Suitable for all known engine oils, the OPR V2s will down regulate any oil pressure to ensure the critical balances inside your turbocharger (exhaust drive, back, and charge pressures) are not compromised by over-pressurized engine oil causing consumption of oil and smoking. They eliminate trial and error with restrictors and orifice sizes, or the need to fit and plumb a return line to regulate pressure. Additional features: * Aluminum (6262 T-6) anodized body and valve * Output regulated oil pressure suits most turbochargers * Stainless steel (304) mesh oil filter * -4 AN inlet and outlet * 1/8 in. NPT sensor/gauge port * Directional inlet feed logic

4.67 out of 5 stars ( 3 )

$147.63

Dart Iron Eagle Mopar Gen III Cast Iron Bare Blocks

Designed from a clean slate approach, Dart now offers the Iron Eagle Mopar Gen III cast iron bare blocks that address the shortcomings of the Hemi Gen III platform, and are the ideal candidate for hot rodders, drag racers, circle track competitors, off-roaders, and high performance marine enthusiasts. By utilizing conventional style main caps with Gen III rotating assemblies and related components, Dart has addressed the windage and oil control problems, along with revising the cooling and oiling passages for improved flow. Non-VVT and VVT version offerings are available. Get everything you ever wanted out of your Gen III Hemi engine with the Iron Eagle Mopar Gen III cast iron bare blocks by Dart! Key features of Dart Iron Eagle Gen III Hemi cast iron engine blocks: * Manufactured from superior strength cast iron * Priority main oiling system with two lifter crossovers and restrictor provisions * Siamese cylinder bores with extra thick walls * Extra-thick decks ensure reliable head gasket seal * Blind head bolt holes available in 7/16 in. standard or 1/2 in. upgrade * Scalloped water jackets increase flow around cylinders for better cooling * Clearance for 4.050 in. stroke with steel rods * Billet steel 4-bolt main caps 1-5, center 3 main caps splayed * Main studs standard * Gen III Hemi style motor mounts * Provisions for OE stock roller lifters and cam * Uses stock timing covers * All OE bolt holes for starter, water pump, etc. * Block can be machined for VVT or non-VVT camshafts * Parts kit included (32000050 for non-VVT, or 32000051 for VVT); note parts kits do not include cam bearings

Not Yet Reviewed

$4,610.99

World Products Merlin IV Engine Blocks

World Products has made improvements to virtually every area of the new Merlin IV engine blocks—with the goal of producing the most technologically advanced and best-performing iron BBC block available today! New features include thicker main webs for increased strength and thicker cylinder walls which are nominally .310 in. @ 4.600 in. bore. In addition to the standard BBC 9.800 in. and 10.200 in. deck heights, new heights measuring 9.500 in., 9.850 in. and 10.250 in. are now available. The World Products Merlin IV engine blocks are also available with a 2.120 in. BBC cam journal and standard .842 in. lifter bores, or with a 2.283 in. journal for a 55mm Babbitt cam and .904 in. lifter bores. World Products has added a front oil feed for dry sump systems, and relocated the lifter oil feeds and restrictor provisions to the front of the blocks.

5.0 out of 5 stars ( 3 )

$3,842.02

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$5,173.48

Dart LS Next Cast Iron Bare Blocks

Dart LS Next cast iron bare blocks integrate the robust heritage of a traditional Chevy small block with the performance potential of the late model LS engine architecture. The blocks are designed to rectify some of the former LS's more noticeable shortcomings on the bottom end—while still supporting high-flow and efficient cylinder heads developed for Gen III and IV platforms. They're available in multiple engine block styles, including stock/OEM standard deck and aftermarket. Dart LS Next blocks are back and better than ever! Highlight features of the LS Next cast iron bare blocks include: * Cast with premium cast iron alloy * Conventional style 4-bolt steel main caps * Full main webbing for maximum bottom-end strength * Extended cylinder barrels at the bottom to provide greater piston support for all combinations * Extra-thick Siamese cylinder bores * Blind head bolt holes don't go through into the water jacket * Provision for oil restrictors in the lifter valley * Revised low-restriction priority main oiling system * Pro-Stock/Pro-Mod big block style stepped main oil galley * External oil filter (must be used with stock or aftermarket oil pumps) * Dual starter mounts * Expanded water jacket on #1 cylinder for additional cooling capacity * LSX-style lifter bosses and dog bone provision are provided

Not Yet Reviewed

$3,999.99

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$4,499.99

Turbosmart OPR T40 Oil Pressure Regulators

Many turbochargers are built around a bearing and oil pressure profile much lower than is seen by modern and high-performance engines. Feeding these turbochargers the appropriate oil pressure has always been challenging. Traditional methods to limit oil pressure have been with a restrictor aimed at reducing pressure, which also reduces flow. Turbosmart OPR T40 are true regulators allowing the target oil pressure of 40 psi to be achieved without compromising oil flow. This takes the guesswork out of the restrictor or feed and drain hose selection and ensures the oil going to the turbocharger never exceeds the manufacturer's tolerances, providing you with a rock-solid oil supply pressure within the manufacture's tolerances. Turbosmart OPR T40 regulators are available in black or blue, as well as a special edition all-black "sleeper" version. Select the one you like best. Features: * Fixed 40 psi configuration * -4 AN ports * 1/8 in. NPT gauge port

5.0 out of 5 stars ( 1 )

$138.55

Dart SHP Special High Performance LS Next Pro Cast Iron Bare Blocks

Dart SHP Special High Performance LS Next Pro cast iron bare blocks continue the evolution of their LS Next platform with superior strength. With full skirt designs, priority oiling systems, and other excellent features, these SHP LS Next Pro blocks are the perfect upgrades for your factory LS blocks, as well as ideal starting points for drag racers, circle track competitors, off-roaders, and high performance marine enthusiasts. Dart SHP LS Next Pro cast iron bare blocks feature: * Superior strength 220 BHN cast iron * Steel 4-bolt main caps with upgraded ARP main studs * Lifter oil crossover with restrictor provision * 6-bolt per cylinder capability * 4.000 in. up to 4.185 in. bore * Factory oil filter provision * 8-counterweight machining * Full skirt design * Priority main oiling * Siamese cylinder bores * Thick decks ensure reliable head gasket seal

5.0 out of 5 stars ( 1 )

$4,699.99

Ford Performance Parts 427 C.I.D. Boss Short Block Assemblies

Ford Performance Parts 427 c.i.d. Boss short block assemblies provide you with the perfect foundation for building your high-horsepower Boss engine. They start out with an iron 4-bolt main Boss block with a 9.500 in. deck height, then add a 4.000 in. stroke steel crankshaft and a set of forged steel H-beam connecting rods with floating pins, and top that off with a set of 4.125 in. bore forged pistons. Ford Performance Parts 427 c.i.d. Boss short block assemblies require Boss cylinder head bolts or studs and Ford Performance Parts or aftermarket cylinder heads. Additional technical information: * Engine type: 351 based small block Ford * Iron 4-bolt main block with 9.5 in. deck height (M-6010-Z351) * .005 in. below piston to deck height (nominal) * SCAT forged steel 4.000 in. stroke crankshaft * SCAT forged steel H beam connecting rods with floating pins and ARP bolts * Mahle 4.125 in. forged pistons, with reliefs for Z304D, Z304P, N351, and other inline valve Windsor cylinder heads * 17 cc piston dish; check piston to valve clearance * Hydraulic roller camshaft compatible; requires aftermarket tie bar hydraulic lifters * 0.060-inch oil galley restrictors included for solid roller cam applications * Internally balanced * Uses standard Windsor timing cover (M-6059-D351) * Standard Windsor oil pan flange * Recommended cylinder head fasteners M-6065-BOSS head bolts or M-6014-BOSS studs depending on application * Compatible with most aftermarket performance cylinder heads; designed for 20 degree valve angle heads and will fit stock or spread valve guide centerlines * Not designed for production 302/351W or M-6049-Y302/Y303/X302/X303/X304/X305 cylinder heads * Requires M-6051-R351 head gaskets * High-performance harmonic balancer M-6316-D302 recommended * Built with all new parts * Hand assembled in the USA with performance clearances * Photo and specifications may vary

Not Yet Reviewed

$5,333.99

Dart Little M2 Small Block Chevy Cast Iron Bare Blocks

The Dart Little M is designed from the ground up as a true racing engine block which can be used with standard off-the-shelf small block components. These small block Chevy bare blocks are cast from premium high-strength iron and beefed up in all the critical areas. A competition oiling system ensures adequate lubrication to the main bearings at high RPM. Front and rear external oil feed, crossover and restrictor provision simplify plumbing with external pumps. Select from various options: * Chevy 350 or 400 main journal type * Aftermarket or stock/OEM standard deck style * Standard or tall deck height * Cylinder bore dimensions

Not Yet Reviewed

$3,799.99

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$6,934.99

Dart Race Series Small Block Chevy Aluminum Bare Blocks

With displacements up to 455 cubic inches, the Race Series small block Chevy aluminum bare blocks are an ideal starting point for any project that involves sprint cars, modifieds, late model stock, dragsters and unlimited competition classes. Incorporated features include: * Standard 9.025 in., tall deck 9.325 in. and 9.500 in. versions allow for greater versatility. * Raised camshaft .391 in. (4.912 in. camshaft to crankshaft centerlines) provides more clearance for stroker cranks and eliminates need for fragile small base circle cams. Option for .434 raised cam also available * Relocated oil pan rails are spread .400 in. per side (.800 in. wider than stock) to increase crank/rod clearance and reduce windage losses * Siamesed cylinders: Standard 4.000 in. or 4.125 in. cylinder can be safely bored to 4.185 in. (ductile iron sleeves and extr-thick walls prevent cracking and produce excellent ring seal * Oil pan bolt holes are relocated in line with main caps to eliminate interference with rotating assembly * Main bearing bores are available for 350 (2.45 in.) and 400 (2.65 in.) bearings allow engine builders to maximize crankshaft strength and minimize friction * 4 bolt billet steel main caps have splayed outer bolts minimize bearing bore distortion * Big block camshaft bearings allow use of cams with larger base circle diameter to improve strength and resist twisting with cam driven pumps * Dual starter mounts allow starter to be mounted on either side of block for chassis and oil pan clearance * Front and rear external oil inlets, crossover and restrictor provisions to simplify plumbing with external pump * Scalloped outer water jacket walls improve coolant flow around the cylinder barrels to equalize temperatures * Coated cam bearings, freeze plugs and dowels are included

Not Yet Reviewed

$6,999.99

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$7,949.99

Dart LS Next2 Cast Iron Bare Blocks

Dart's LS Next2 cast iron bare engine block can elevate your LS Next platform with 9.240/9.450 deck heights, 4.000/4.125 bores, and billet steel main caps. Unleash unmatched strength with 1/2 in. main studs and compatibility for 8CW crankshafts and 1/2 in. head studs. Blocks come machined to accept fully counterweighted crankshafts. Additional details and specs: * Larger 4-bolt billet steel main caps * Priority main oiling system with two lifter crossovers and restrictor provisions * Siamesed cylinder bores with extra thick walls * Cylinder barrels extended .375 in. at the bottom * Extra thick decks ensure reliable head gasket seal * Blind 1/2' head bolt holes * Scalloped water jackets increase flow around cylinders for better cooling * Clearance for 4.100 in. stroke with steel rods * Clearanced for center counterweighted crankshafts * 1/2 in. main studs, with 4 splayed outer bolts on middle main bearing caps * LS style motor mounts * Provisions for OE stock roller lifter and cam * Uses stock timing covers and stock rear cover * All OE bolt holes for starter, water pump, etc. * Driver or passenger side starter mounts * Camshaft location: Standard * Freeze plug type: Brass press-in * Camshaft lifter bore: 0.842 IN * Main bearing type: Chevrolet LS * Main cap type: 4-bolt * Rear main seal type: LS * Engine type: ICE

Not Yet Reviewed

$5,449.99

Dart Iron Eagle Small Block Chevy Cast Iron Bare Blocks

Dart Iron Eagle small block Chevy cast iron bare blocks are designed to meet the needs of hot rodders, stock car racers, sprint car teams, drag racers, and road racers who want a real racing block--but at an affordable price. These versatile Dart blocks are a great starting point for big cubic inch small block projects--you can even build a 455 c.i.d. small block! Iron Eagle Small Block Chevy cast iron bare blocks feature: * Standard 9.025 in. and tall deck 9.325 in. versions allow for greater versatility * Raised camshaft .391 in. (4.912 in. camshaft to crankshaft centerlines) provides more clearance for stroker cranks and eliminates need for fragile small base circle cams (option for .434 raised cam also available) * Relocated oil pan rails are spread .400 in. per side (.800 in. wider than stock) to increase crank/rod clearance and reduce windage losses * Oil pan bolt holes are relocated in line with main caps to eliminate interference with rotating assembly * Dual starter mounts allow starter to be mounted on either side of block for chassis and oil pan clearance * Front and rear external oil inlets, crossover and restrictor provisions provided to simplify plumbing with external pump

Not Yet Reviewed

$5,499.99

Brodix Cylinder Heads Block Parts Kits

Brodix Cylinder Heads block parts kits are for use with Brodix's cast iron small and big blocks. Each kit includes plugs, dowel pins, restrictors, and cam bearings for your block build.

Not Yet Reviewed

$67.99

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$111.99

Dart Race Series Small Block Ford Aluminum Bare Blocks

Dart puts Ford racers in front with their Race Series small block Ford aluminum bare blocks designed just for Fords! The highlights and features of Race Series blocks include: * Cast 355-T6 aerospace alloy blocks for superior strength and integrity * Siamesed cylinders with standard 4.00 in. or 4.125 in. cylinder bores, which can be safely bored to 4.165 in. diameters * Ductile iron sleeves and extra-thick walls prevent cracking and produce excellent ring seal * Scalloped water jackets increase coolant flow around cylinder barrels to prevent detonations, extend engine life, and produce consistent cylinder temperatures * Four deck heights are available * Steel 4-bolt main bearing caps are standard. Three center caps have splayed outer bolts for maximum strength; rear cap uses standard one-piece seal * Two main bearing diameters of 2.249 in. or 2.749 in. allow choice of small or large journal crankshaft * Stock components make Dart blocks a direct replacement for most production small blocks. * Provisions for stock motor mounts, accessory drives, smog pumps, starter brackets, oil pans, and pumps * Upgraded oiling system has a complete stock-type system, plus a low-restriction priority main oiling with front and rear external oil pump feeds * Dual crossovers allow oil flow to be metered with restrictors for roller lifter cams and/or roller rocker arms to reduce oil flow and windage * Reinforced head bolt bosses are blind-tapped to prevent leaks and produce accurate torque readings * Extra-thick decks prevent head gaskets leaks * Standard camshafts and camshaft drives can be used * Precision CNC machining ensures consistently high quality and eliminates expensive "blueprinting"

Not Yet Reviewed

$6,999.99

Brodix Cylinder Heads 8B 5000 Series Aluminum Engine Blocks

Brodix Cylinder Heads 8B 5000 Series aluminum engine blocks have taken the 5.0 bore spacing market to the next level. They combine the size and durability of a 5.0 in. bore spacing block with the convenience and availability of their 4.840 in. bore spacing counterpart. The engine blocks are 100 percent CNC-machined and employ the same technology that has made Brodix the undisputed leader in aluminum block development. Brodix Cylinder Heads 8B 5000 Series aluminum engine blocks feature: * Available 1.200 in. or 11.625 in. deck heights * Oil restricted from the front (must use Brodix oil restrictors, sold separately) * Proprietary A-356 virgin aluminum * 1044 steel billet main caps * Splayed center main caps * Can be machined for roller cam bearings * Strong main webbing * Accepts stroker oil pans * 1.0 raised cam location * Additional head bolt lugs in deck area * Thick wall sleeves with 1/4 in. registers * Allow bore sizes up to 4.700 in., special sleeves available for up to 4.750 in. bores * Reinforced lifter valley * .937 in. or 1.062 in. lifter bore diameters available * Can accept 5.375 in. stroke as cast, up to 5.750 in. with additional machining * Dry sump oiling only * O-ring freeze plug kit

Not Yet Reviewed

$9,860.99

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$9,966.99

Isky EZ-Roll Jr. Lifters

Isky EZ-Roll Jr. lifters are needle-free for racing in the "extreme zone". Their proprietary solid-raceway bearing has been proven to carry greater loads and they are oil-restrictor friendly. The EZ-Roll Jr. lifters meet entry-level demands, accepting both 5/16 in. and 3/8 in. diameter pushrods, and targeting use up to 700 lbs. of open valve spring pressure for street, drag, marine, and oval track. Roll easy with patented EZ-Roll Jr. lifters from Isky Racing.

Not Yet Reviewed

$1,107.99