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AFR 385cc Magnum BBC competition racing heads will feed your large displacement, high-rpm race engine the air it needs to deliver monster performance. The 385cc Magnum features AFR's trademark .750 in. thick head deck, A356 aluminum castings and Titanium retainers, as well as 100 percent CNC-ported intakes, exhausts, and combustion chambers to deliver the big flow characteristics to provide you with the power you need to win! Keep your monster engine both strong and powerful—allow it to feast on the plentiful airflow of the AFR 385cc Magnum BBC competition racing heads.
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$5,344.50
Summit Bucks
AFR 377cc Magnum BBC Competition racing heads feature 100 percent CNC-ported intakes, exhausts, and chambers; A356 aluminum castings, Titanium retainers, and high-quality components throughout. These Magnum BBC heads are best suited for large displacement (540 plus) racing engines operating at or below 7600 rpm. They are available assembled and bare. AFR assembled 377cc Magnum BBC heads typically include: * 11/32 in. intake valves * 11/32 in. Tulip exhaust Valves * PAC Racing Spring 1.625 O.D. Solid Roller, 275 lbs. on seat, .850 maximum lift * 10 degree Titanium retainers * 10 degree 11/32 in. valve locks with lash cap recess * ARP 7/16 in. rocker intake and exhaust studs * Adjustable 3/8 in. guide plates * 11/32 in. Viton® valve seals * Hardened spring cup * Intake and exhaust valve seats * 11/32 in. intake and exhaust bronze valve guides
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$5,344.50
Summit Bucks
The S&S Cycle 124 in. big bore/stroker Hot Set-Up kits transform a stock Harley-Davidson® engine into a 124 in. monster. It includes: 4 1/8 in. bore pistons; big bore cylinders finished in wrinkle black powdercoat; a dynamically balanced 4 5/8 in. stroke 3-piece flywheel assembly complete with heavy-duty connecting rods and integral mainshafts; 640 gear drive Easy Start camshafts; chromoly steel adjustable pushrods; premium tappets; and Super Stock 91cc cylinder heads. When installed, the kits yield a 124 in. engine with a compression ratio of 11:1. Although the engine is .960 in. taller than stock, there are no frame clearance problems—and a stock EFI throttle body will fit, because the manifold mounting surfaces of the heads have been specially machined to fit a stock length manifold. If you ride a 2006 HD Dyna model, or a balanced or non-balanced Big Twin from 2007-17, these top-end engine rebuild kits are for you. Note: No fuel or ignition system is included. However, for the best results, a larger EFI throttle body, performance intake, and performance exhaust are recommended. The EFI system must be recalibrated. Although not mandatory, S&S recommends adding an oil cooler to bikes ridden in warmer climates. S&S does not recommend compression ratios higher than 10:1 for Tri Glide or other 3-wheel models (including conversions) due to extra loads caused by the lugging nature of these bikes. Detonation and subsequent engine damage may result.
Not Yet Reviewed
$5,636.66
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$6,128.06
Summit Bucks
S&S Cycle offers MK136 Black Edition engines for a variety of Harley-Davidson© oil-cooled Touring street bikes from 2017 and up. Details include: CYLINDER HEADS: * High-flow cylinder heads with premium seats, guides, valves, springs, and seals * +1mm oversized intake and exhaust valves * Valves are .030 in. longer than stock for improved valvetrain geometry * .605" max lift valve springs * High-strength alloy used in cylinder head casting, improved strength at high temperatures * Enlarged cooling passage around the exhaust seats * S&S Exclusive breather boxes CRANKCASE: * All premium quality components * Patented dual-spray piston cooling jets * Precision-machined oil scraper * Enlarged oil sump * Contoured floor allows oil to easily drain back to the sump MK136: * Forged pistons * S&S performance oil pump and cam support plate * Premium tappets and tappet cuffs * Billet aluminum covers * Sprocket shaft spacer included * Champion spark plugs * Retains stock engine height * Includes cam cover badge * Powdercoat finish matches factory finish * Huge displacement increase means a huge power increase
Not Yet Reviewed
$11,999.95
Summit Bucks
Go from mild to wild with S&S Cycle T-Series long block engines. These long block engines fit in the stock chassis and require no frame modifications. They feature S&S easy start camshafts, 3-piece heat-treated 4140 flywheel assembly, high-flow oil pump, and cam cover. Engines are protected by a super tough powdercoated finish, and are available in black wrinkle, stone gray, and black edition color schemes. Make your Dyna or tourer a stump puller with S&S Cycle T-Series long block engines.
Not Yet Reviewed
$9,699.95
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$13,678.97
Summit Bucks
Why rebuild that old stock Evo engine? Just replace it with S&S Cycle V-Series long block engines. These engines will save you unwanted down time and money by using your existing fuel or aftermarket ignition system. Tuning your carburetor or EFI system will be required, but definitely worth the extra effort. S&S Cycle V-Series long block engines are built using genuine S&S components, so you know this motor is built to last.
Not Yet Reviewed
$6,369.95
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$7,199.96
Summit Bucks
S&S V-Series engines for 1984-99 Big Twins are available as complete engines in a variety of displacements, depending on your horsepower needs. They are stock appearing, but feature updated internal components for improved performance and reliability. Choose from natural, as-cast aluminum, wrinkle black powdercoat, and Black Edition finishes. All S&S V-Series complete engines will bolt into your factory chassis and will include either a S&S Super E or G carburetor and Super Stock ignition.
Not Yet Reviewed
$7,329.95
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$8,099.96
Summit Bucks
S&S offers performance engines in a variety of displacements. S&S Cycle P-Series engines for Panheads are no different. They offer a vintage vibe with modern muscle. These engines are stock appearing but feature updated internal components for improved performance and reliability. If you are building a custom framed bike or it is just time to upgrade that old engine, S&S Cycle P-Series engines have what you are looking for.
Not Yet Reviewed
$10,199.95
Summit Bucks
If huge horsepower is what you are searching for, AFR 357cc Magnum aluminum cylinder heads will certainly deliver. With AFR's fully CNC-ported 357cc heads flowing 425 cfm, they represent the ultimate in airflow for your big block Chevrolet. These cylinder heads were targeted at larger cu. in. engines (509-632 c.i.d.) looking for maximum horsepower and rpm capabilities with a primary operating range of 3,500-8,000 rpm (this range is an average and will vary with engine displacement and component selection). These aluminum heads also provide impressive torque figures at higher rpm levels. Blown, turbo, and nitrous engines will especially like the larger, higher flowing intake ports. AFR 357cc Magnum BBC cylinder heads will work best with camshafts exceeding 0.750 in. gross valve lift to make better use of the substantial airflow found in the higher lift range. The AFR 357cc heads come standard with AFR's trademark 3/4 in. thick cylinder head deck, reinforced rocker stud bosses, and premium one-piece stainless steel 2.300 in. intake and 1.880 in. exhaust valves. The AFR's fully CNC-ported 357 heads come with a 121cc chamber and are available with an optional 114cc combustion chamber as well. Order the cylinder head model suited to your needs.
Not Yet Reviewed
$5,184.90
Summit Bucks
S&S offers performance engines in a variety of displacements. S&S Cycle SH-Series engines for Shovelheads are no different. They offer a vintage vibe with modern muscle. These engines are stock appearing but feature updated internal components for improved performance and reliability. If you are building a custom framed bike or it is just time to upgrade that old engine, S&S Cycle SH-Series engines have what you are looking for.
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$9,199.95
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