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AFR's 335cc BBC Enforcer cylinder heads feature their Permanent Mold "As-Cast" Technology surfaces on the intake runners, exhaust runners, and combustion chambers that allow for extremely accurate and repeatable port location/performance. These budget-friendly heads are perfect for your 509 to 540 cu.in. operating below 6,500 rpm. They come fully assembled with the identical components found in AFR's higher end CNC-ported cylinder heads—such as ARP rockers studs, PAC Racing springs, Viton® valve seals, AFR adjustable guide plates, machined bead valve locks (not stamped), hardened spring seats, and AFR's one-piece 8mm 21 4N stainless steel valves. Order the cylinder heads recommended for your year/make and engine application.
( 5 )
$1,023.75
$921.38
On Sale
AFR 210cc LS1/LS2/LS6 Enforcer cylinder heads are available in standard and small bore applications. They feature Permanent Mold "As-Cast" Technology surfaces on the intake runners, exhaust runners, and combustion chambers that allow for extremely accurate and repeatable port location/performance. The budget-friendly heads are perfect for your OEM engine operating below 6,300 rpm. Fully assembled Enforcer models include the identical components found in AFR's higher end CNC-ported cylinder heads—such as PAC Racing springs, Viton® valve seals, machined bead valve locks (not stamped), hardened spring seats, and one-piece 8mm 21 4N stainless steel valves. The heads are available without any parts for the DIY. Sold as a single piece, two heads are required per engine.
( 2 )
$780.15
$702.14
On Sale
BTR Beehive valve springs, with their conical shape, can deliver enhanced performance. They may also provide lower seat pressures, so your valvetrain components are less stressed. BTR springs are produced from quality materials, and their beehive design will support more RPMs than stock cylindrical springs. Valve springs are the fastest moving components in your engine. Choose BTR Beehive valve springs for better durability, higher RPM potential, and performance. They're available in a variety of size, pressure, and lift options for countless applications from 2001 and up.
( 9 )
$6.99
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$149.99
$6.29
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$134.99
On Sale
Sting the competition with the full-body design of Scorpion Race Series roller rocker arms. They're precision-crafted via high-tech manufacturing methods, then fully CNC-machined. These rockers offer more clearance for retainers and springs, and can easily handle .950 in. lift and 950 lbs. of open spring pressure. The surfaces are micro-polished and anodized for looks, protection, and maximum durability. Scorpion rocker arms are available in nearly 200 fitment options; order the set recommended for your application. More speed for your high performance passion! Additional features include: * Aerospace-grade 7000 Series aluminum for maximum strength and durability * Needle bearing fulcrum and roller tip * Precision-ground needle bearings * Centerless ground trunnion, ground pin, and roller * Burr-free trunnion through hole * Directed oiling * Large machined seat and thick-walled adjusting nut (polylock) * Pedestals machined from solid steel * Black oxide coated steel parts * 1.600 in. fulcrum width * Clear 1.625 in. O.D. valve springs
( 212 )
$26.41
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$775.77
$22.98
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$674.92
On Sale
Heading offshore? Go with Scorpion Endurance marine rocker arms. They have the stamina to get the job done in your powerboat racing engine. These marine rockers are designed to fit under stock height valve covers with no interference and can easily handle a .950 in. lift and 950 lbs. of open spring pressure. Scorpion rocker arms are micro-polished to endure over a long period and are anodized for additional protection, as well as great aesthetics. Choose your ratio and gain the stamina to sting your competition with Scorpion Endurance marine series rocker arms. Additional features include: * Lightweight design with short polylocks * Needle bearing fulcrum and roller tip * Centerless-ground trunnion * Ground pin and roller * Burr-free trunnion through hole * Large machined seat * Solid steel pedestals * Black oxide coated steel parts * 100 percent CNC machining
( 5 )
$587.46
$511.09
On Sale
Scorpion Endurance Series rocker arms offer you power that perseveres. With less weight and a lower profile these Endurance rocker arms are built with the stamina to get the job done in winning style. Scorpion specifically designed these rocker arms for endurance racing engines with better fitment and they can easily handle up to 750 lbs. of open spring pressure. Plus, they're approximately 28 grams lighter than their Race rockers! Endurance rocker arms are micro-polished to endure over a long period and are anodized for additional protection, as well as providing great aesthetics. Choose your ratio and gain the stamina to sting your competition with Scorpion Endurance Series rocker arms. Additional features include: * Aerospace-grade 7000 Series aluminum * Full body design * Precision ground need bearings * Centerless-ground fulcrum * Ground pin and roller * Burr-free trunnion through hole * Large machined seat * Solid steel pedestals * Black oxide coated steel parts
( 33 )
$31.46
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$527.39
$27.37
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$458.83
On Sale
Recommended for aggressive street/strip builds with displacements up to 427 c.i. operating at or below 7200 rpm. Capable of flowing 328 cfm at 0.650 in. lift with a 4.000 in. bore size. AFR street legal 230cc LS1 Mongoose strip cylinder heads are specifically designed for Gen III Chevy Corvettes, Camaros, and trucks. LSX cylinder heads offer unmatched flow performance and feature 2.080 in. intake and 1.600 in. exhaust valves with their ductile iron interlocking valve seats. Mongoose strip heads are available with 62cc, 65cc, and 72cc combustion chambers. Structural features like AFR's trademark 3/4 in. thick head deck, a must for blown and nitrous applications, reinforced rocker stud bosses, and thick wall runners provide unparalleled durability. An exclusive new modern combination chamber design with a double quench pad area helps the LSX generate huge low and mid-lift airflow numbers.
( 7 )
$3,332.70
$3,166.35
On Sale
AFR 195cc SBF competition cylinder heads feature 100 percent CNC-machined intake ports, exhaust ports, and combustion chambers. Manufactured in A356 aluminum and assembled with high-quality components, these AFR 195cc SBF competition heads are recommended for displacements up to 408 cu. in., and operating up to 6500-6800 rpm. They are not compatible with OEM pistons. They are available with or without EGR and air pump, as well as with either 58cc or 72cc chamber sizes. Components for these AFR cylinder heads include: * Competition 5-angle valve job * 8mm bead lock intake valve * 8mm bead lock exhaust valve * PAC racing spring 1.270 in. O.D. hydraulic roller dual valve spring; 155 lbs. on seat, .650 in. maximum lift, maximum rpm 7000 to 7200 * 7 degree chromoly retainers * 7 degree bead lock valve keepers * 7/16 in. rocker studs * Adjustable 5/16 in. guide plates * Viton® valve seals * Hardened valve spring I.D. locator * Ductile iron intake valve seats 2.131 in. O.D x 1.680 in. I.D x .375 in. deep * Ductile iron exhaust valve seats 1.650 in. O.D x 1.350 in. I.D x .375 in. deep * Bronze valve guides * Air injector reducer bushing
( 3 )
$2,947.35
$2,799.65
On Sale
Manley titanium valves feature forged one-piece construction with grain flow, not a head welded to a stem. These jewel-like valves are machined in state-of-the-art CNC turning centers and valve stem grinders to exacting tolerances. Manley utilizes the finest titanium alloys for both the intakes and exhausts, providing the best balance of mechanical properties, hardness, ductility, and fatigue strength at the given temperatures. All Manley titanium valves must pass their rigorous final inspection process, and strict quality control enables them to deliver parts within tight tolerance. Custom valves can be delivered within a very reasonable turnaround time. Seat coatings are also available on certain shelf stock part numbers, as well as on custom valves.
( 3 )
$141.58
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$1,561.93
$134.50
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$1,483.83
On Sale
Quicksilver's long block assemblies are all-new (not rebuilt, remanufactured, or reconditioned) marine engines and feature improved components, technology, and built-in durability designed to withstand years of marine duty--one of the most abusive and demanding environments for any engine. The foundation of every Quicksilver long block engine is a new iron block cast to Quicksilver's specifications and designed expressly for marine duty. Thicker castings ensure quieter operation and better durability in saltwater when compared to a standard automotive block. They feature Black-X composite valves that contribute to a 42 percent reduction in valve wear compared to traditional stainless steel valves with hardened seats, while smooth-flowing cylinder heads deliver added performance. Quicksilver Value Series long blocks are cost-effective solutions when replacing an engine with a reliable fuel system and dress components that can be reused, typically when the original engine block has suffered freeze damage. Select the long block needed for your build.
Not Yet Reviewed
$5,324.99
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$8,429.99
$4,792.49
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$7,586.99
On Sale
Manley connecting rod bearings are high performance, premium Clevite H Series narrowed rod bearings. This legendary brand and series offer a medium level of eccentricity, high crush, and has a hardened steel back and thin overlay. They are made without flash plating for better seating and were developed primarily for use in NASCAR-type racing, but suitable for all types of competition engines. Complement your Manley connecting rods with bearing they prefer to be the best choice for optimal performance—Clevite H Series.
Not Yet Reviewed
$143.43
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$168.34
$136.26
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$159.92
On Sale
Quicksilver cylinder heads are ideal replacement components for many GM-style 4-cylinder and V8 engines in marine, circle track racing, RV, truck, and hard-to-find industrial applications. With exclusive Black-X valves, they are designed to be the most robust, durable, and toughest service cylinder heads available. Select the cylinders heads designed to fit your engine. Features and benefits: * Thicker castings * Improved combustion chamber for better burn characteristics * Premium springs and hardened seats on the intake and exhaust ports * Quicksilver exclusive Black-X valves -- Composite valves -- Stainless steel treated with a cobalt-chromium alloy and black plasma nitriding -- Contribute to a 42 percent reduction in valve wear compared to traditional stainless steel valves with hardened seats -- Longer engine life, especially in the presence of modern ethanol-blended fuels * Backed with a 1-year limited warranty
Not Yet Reviewed
$1,316.99
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$1,548.99
$1,185.29
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$1,394.09
On Sale
All Edelbrock aluminum cylinder heads feature threaded inserts in the rocker studs and exhaust manifold bolt holes for superior strength and durability. They also include hardened seats, bronze valve guides, and fully machined valve cover rails for a more consistent gasket seal. They offer improved power throughout the rpm range for greater throttle response and top-end horsepower. The intake and exhaust runners are CNC-machine profiled for superior flow and performance.
( 41 )
$1,087.50
$870.00
On Sale
Torque wins races. Reliability wins championships. Quicksilver Circle Track crate engines are designed to deliver on both counts. These small-block V8 engines are factory sealed for fair competition and will deliver season after season of reliable racing performance with minimal maintenance, while producing full power on pump gasoline. To comply with popular stock-class racing rules, Quicksilver Circle Track engines are shipped with factory seals on the intake, front cover, oil pan, and cylinder heads. Built with premium quality components, they feature a roller camshaft design and offer the best value for dirt and asphalt Circle Track racing. Order the engine needed for your build. Features: * Durable GM Gen+ remanufactured cast iron blocks -- Cost-effective and durable solution for this application -- Single-piece rear main seal -- 8-bolt 4-barrel aluminum intake manifold -- 6-quart oil pan * Roller camshaft * Hydraulic lifters * Stainless steel valves, hardened valve seats, head gaskets with stainless steel fire rings, and heavy-duty marine valve springs for extended life * 6 in. SFI-approved balancer * For off-road racing only * Shipped with a fresh fill of Quicksilver Performance Racing 25W-40 synthetic blend oil
Not Yet Reviewed
$7,306.31
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$16,972.50
$6,575.68
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$15,275.25
On Sale
These Severe Duty Gen II custom valves with unmatched strength and superiority are the only valves of their kind. Exhaust material XH-428 and intake material NK-844 are paired together for ultimate dominance over all others. With four times the tensile strength of competitors' intake valves and supremely better fatigue life, Manley Severe Duty Gen II custom valves truly show their commitment to seeing that you're there at the finish. You decide the head diameter and seat and margin widths, as well as valve length, groove type, and location for the perfect custom setup!
Not Yet Reviewed
$40.34
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$525.56
$38.32
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$499.28
On Sale
The diameter of your valve guide may become worn over time. Crown Automotive valve guides are quality replacements for your intake and exhaust valves. These guides serve to positively locate the valve so that it may make proper contact with the valve seat, and they are critical for the proper performance of an engine. Go with Crown, an aftermarket industry leader.
( 1 )
$5.99
$5.39
On Sale
Airflow Research developed these 185cc SBF Enforcer cylinder heads for maximum small block Ford performance. They're manufactured from tough but lightweight A356 aluminum and feature 185cc intake runners and 64cc combustion chambers. Enforcer heads feature a 0.325 in. deck, stock valve locations, and are designed for blocks with a minimum bore of 4.000 in. The heads are available bare or fully assembled with stud mount rocker mounting.
( 21 )
$767.55
$690.80
On Sale
Think you have to scour the local bone yards to find a decent set of GM's old double hump or fuelie cylinder head castings? Not true. In fact, we've brought back classic Chevy performance in a big way with these ready-to-run heads for small block Chevy. Our versions of the popular GM cylinder heads offer great performance for less than it would cost to rebuild an old set of double hump castings.
( 127 )
$649.99
$499.99
On Sale
Deliver power-building airflow to your engine with Summit Racing™ Vortec cast iron cylinder heads. These heads outflow the early model small Chevy heads with wide-open intake runners, efficient combustion chambers, and a high-performance valve job. They are made from a strong cast iron alloy that makes them less brittle than comparable Vortec heads on the market. For performance and great value, select the Summit Racing™ Vortec cast iron cylinder heads preferred for your build.
( 74 )
$649.99
$499.99
On Sale
If you need the world's finest high performance street/strip small block Ford heads, then check out AFR's 185cc emissions-legal Renegade Street cylinder heads (CARB E.O. #250-3). With lightweight 8mm, 2.020 in. intake valves and 1.600 in. exhaust valves, combustion chamber volumes of 58 or 72cc, and 68cc exhaust ports, AFR's 185cc Ford cylinder heads are designed for 302-351 c.i.d. engines operating from 1,500 to 6,500 rpm. A 3/4 in. thick head deck makes the AFR heads ideal for nitrous or blower applications. These heads will not accept rail rocker arms, and hardened push rods are required on models designed for stud mount rocker arms.
( 37 )
$2,328.90
$2,212.55
On Sale
Manley NexTek valve spring and retainer kits are designed and manufactured for optimum consistency, run after run, lap after lap. They are manufactured from super clean high-tensile chrome silicon steel that has been shot peened to MIL specs for maximum fatigue life. Proven to have less load loss than many other springs, they exhibit superior fatigue life and enhance valvetrain stability--everything that counts in winning races!
( 1 )
$719.25
$683.29
On Sale
AFR 220cc SBF Renegade 20 Degree Competition Heads are the largest, best-flowing choice to top your small block Ford. These power-producing cylinder heads are born of A356 aluminum castings and feature intake ports, exhaust ports, and combustion chambers that are all 100 percent CNC-ported. Renegades are outfitted with lightweight 8mm, 2.100 in. intake valves and 1.570 in. exhaust valves to move massive amounts of air. They come with either combustion chamber volumes of 58 or 72cc accompanied by 70cc exhaust ports, which are raised .375 in. higher than stock. Plus, AFR's trademark 3/4 in. thick cylinder head deck makes them ideal for heavy nitrous or blower applications. Choose the flow characteristics that can give your Ford the power to win—AFR 220cc SBF Renegade 20 degree competition heads.
( 12 )
$3,143.70
$2,986.80
On Sale
Stay ahead of the competition with high-flowing AFR 235cc SBC Eliminator Competition Racing heads. Intake ports, exhaust ports, and cylinder heads are 100 percent CNC-ported with finer machine levels and improved port-shaped details for optimum flow characteristics. AFR Eliminator Competition heads will satisfy your big displacement small block Chevy engine's need for more air—and to achieve additional cooling in the center of the head, spread port styles are offered. Eliminator Competition heads come complete and ready-to-run with AFR power-proven components—or choose "bare" (no parts) heads to create your own personal power package! Go with AFR cylinder heads—high performance components built for racers, by racers.
( 4 )
$3,820.95
$3,629.95
On Sale
For the ultimate small block Ford street car, consider AFR 165cc SBF Renegade 20 degree street heads. Unlike some aftermarket heads, AFR's Ford cylinder heads (CARB E.O. # D250-3) fit all of your stock components; no special parts are required! With lightweight 8mm, 1.900 in. intake valves and 1.600 in. exhaust valves, combustion chamber volumes of 58 and 60cc, and 68cc exhaust ports, these emissions-legal aluminum cylinder heads are perfect for 289 and 302 engines operating from idle to 6,000 rpm. A 3/4 in. thick head deck makes the heads ideal for nitrous or blower applications. Renegade cylinder heads will not accept rail rocker arms, and hardened pushrods are required on models designed for stud mount rocker arms.
( 28 )
$2,328.90
$2,212.55
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