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The OE rocker arm bearing design is a proven weak link in high-performance LS engines because the bearings are unable to cope with high lift cams, higher valve spring pressures, and sustained high-RPM use. Plus, the uncaptured design allows the needle rollers to be ejected into the crankcase, potentially causing catastrophic engine damage. One way to fix these issues is with a full set of high-quality roller rocker arms. However, many builders prefer the lower cost and lightweight durability of stock rocker bodies. That's where Trick Flow's far less costly solution comes in. The Trick Flow® rocker arm trunnion upgrade kit includes 16 CNC-machined trunnions that are heat-treated and precision ground to tighter tolerances for reduced wear and significantly improved rocker arm control. Precision needle roller bearings withstand high performance cams, valve springs, and repeated high-RPM blasts. They are held captive by extra wide circlips to prevent the bearing walk-out problem of the OE design. The Trick Flow® trunnion installation kit takes all the hassle out of removing old trunnions and installing new ones, with easy installation using just a bench vise instead of a cumbersome hydraulic press like other kits. Best of all, no modification are required to the OE rocker arms to use these upgrade and installation kits! Features Include: • CNC Machined Trunnion - Heat Treated & Precision Ground • Tighter Tolerance & Radial Clearance • Captivated bearing for reliability • Designed for higher stresses and high RPM use • Improved rocker and valve control
Not Yet Reviewed
$163.99
These COMP Cams belt drive replacement components are designed for use in the ultimate in cam timing systems. These components provide competition engine builders with the most accurate valvetrain replacement components available today. COMP Cams has all of the parts you'll need, from cam gear bolts to shims, washers, gears, and more.
( 10 )
$110.95
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$202.95
Cloyes Hex-A-Just Z-Racing timing sets allow the engine builder everything he needs to quickly and easily adjust cam timing to maximize engine output. They feature a complete set of chains and sprockets for flexible timing adjustments to set the cam timing exactly as desired for improved performance and durability. The Z Series chain design increases overall strength and is the no-compromise offering for serious racing engines.
( 3 )
$215.99
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$246.99
COMP Cams phaser lockout kits allow engine builders and enthusiasts to eliminate variable valve timing in specific applications, making the installation of larger camshafts possible for bigger power gains. Phaser lockouts will help gain more piston-to-valve clearance and simplify ECU tuning.
( 1 )
$123.95
No other racing valve on the market has superior materials, is lighter or will flow more than Milodon Megaflow racing valves, as proven by multiple independent engine builders and independent laboratories. These competition valves are forged from one piece of 21-4N stainless steel. They have swirl-polished heads, undercut stems for better gas flow, and tulipped underhead areas for weight savings. With their hardened stellite tips and 1,600 degree F temperature capabilities, they can withstand both high-heat and high-valvetrain stress loads.
( 17 )
$193.95
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$249.95
PRW Pro Series billet aluminum rocker arms offer outstanding power and performance advantages for street, strip, and track applications. Laboriously made from high-strength 6061 T-6 aluminum extrusions, each piece is precision CNC-machined, and hand-finished to ensure the quality you expect from PRW. These stud-mount rockers are purposely machined to graciously allow for larger springs and retainers, with full-cage, friction-reducing needle bearings for added durability. PRW Pro Series billet aluminum rocker arms are used around the world by professional racers, engine builders, and hot rod enthusiasts. Order the set recommended for your specific vehicle and engine size. Features, items, and specs: * Wide assortment of ratios to suit almost any cam profile * PRW RockerLocs * Heat-treated steel nose rollers and shafts minimize wear between roller tip and valve stem * Rated at 750 lbs. open spring pressure * Internal oiling system for long-lasting performance * Distinctive blue anodized finish
( 12 )
$230.18
If you've been searching for a more economical alternative to titanium retainers to solve a wear problem or because of "class rules," Manley H-13 tool steel retainers are your solution. These are serious retainers for serious engine builders who demand nothing less than the very best! The H-13 tool steel retainers allow for better processing than other tool steels typically utilized, thus yielding a stronger and more durable product. They're up to 33 percent lighter than standard 10 steel retainers and are only 2 to 4 grams heavier than titanium versions. In addition, the H-13 tool steel retainers are heat-treated to provide the hardness of Rc56.
( 1 )
$228.31
Clearance
Mahle Original piston ring sets are designed to be installer-friendly. They are pre-lapped to seat immediately, virtually eliminating break-in time. Ring materials and coatings, as well as ring tension, are all optimized for reduced friction and extended life in each application. The compression rings feature a barrel-faced contact area for more efficient compression and CNC-controlled gap chamfer to optimize compression and reduce blow-by. Intermediate rings have a reverse twist design for better groove side sealing, and taper race machining to enhance contact. The CP-20 oil ring assemblies feature a 20 degree ear angle, an exclusive feature that provides the best possible side seal against the cylinder wall, and a special chemical polish on the oil ring expander offers enhanced oil drain back. Mahle Original piston ring sets provide unmatched quality and ease of installation, making them the rings of choice for today's engine builders.
( 53 )
$129.99
$101.50
Clearance
Crower Super 7-degree valve locks are precision-machined from premium billet bar stock chromoly steel. Heat-treated for maximum strength to ensure against the shoulder shearing that is common with stock and lesser-quality keepers, they are color-coded for identification. Serious engine builders should have a complete selection on hand at all times.
Not Yet Reviewed
$320.99
$221.50
Feuling Parts camplate PSI testers are a must for any Harley-Davidson® Twin Cam engine builder. Bench-test each camplate before installation, cycle the pressure relief valve—testing the operation and ensuring that the valve moves freely, and seats and seals each time. Any leakage at the relief valve will reduce oil pressure. These camplate support tools let you know what PSI the relief valve opens; the spring tension can be adjusted to achieve the desired pop off PSI. Testers include: * Air regulator * 0-100 psi pressure gauge * Gaskets and needed hardware * Tool fits all Twin Cam engine camplates
Not Yet Reviewed
$202.95
HardDrive Products cam covers are chrome plated, cast aluminum cam covers for 1973-99 Harley-Davidson® single cam Big Twin engines. They come with the bushings installed; hardware and seals are included. The goal of HardDrive Products is to provide aftermarket parts that make a difference in style, function and performance; they make bike builder dreams a reality.
Not Yet Reviewed
$142.16
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