Heads/Head Components

Feuling Econo Beehive Valve Springs Twin Cam Made from premium stress-relieved conical ovate wire Feature extremely high-level of fatigue life Use a much smaller and lighter weight retainer to reduce valve weight and create quicker rev and smoother motion Designed to handle the demands of performance engines with 585" and smaller lift camshafts Kits include: Econo BeeHive® valve springs, lightweight 7° steel retainers, machined heat-treated chromoly spring seats, seat shims, valve locks and a set of premium Viton® valve seals equipped with spring-loaded valve stem wiper system Seat lbs./installed height; 183 lbs. at 1.770" (0.510" lift), 175 lbs. at 1.795" (0.535" lift), 172 lbs. at 1.813" (0.553" lift), 165 lbs. at 1.835" (0.574" lift), 160 lbs. at 1.845" (0.585" lift), 380 lbs. at 1.260" OPEN HEIGHT coil bind at 1.190" Dyno proven and track tested Feuling® BeeHive® valve springs must be installed at the correct OPEN HEIGHT, matching max lift to the open height spec of the valve springs Made in the U.S.A. Econo BeeHive® kits are direct replacement with no machining or rocker box clearance required for cams up to .574" lift for 84-04 Big Twin and 86-03 XL and up to .585" lift for 05-17 Twin Cam.

S&S Top End Guardian Kit  Building your M8 for big power? We've got the parts you need to bulletproof the top end of your valvetrain in one convenient kit! S&S performance parts are direct replacement for OEM pieces, but are stronger and more durable, giving your M8 the reliability it needs as you build big HP and Torque numbers. Rocker Arm shafts, Rocker Arm Stud Kit, Head Bolt Kit and Performance Roller Rocker Arms are included in this kit that is the perfect topper for your high performance M8 build Rocker Arm Shafts Replace broken or worn OEM pieces with stronger, more durable S&S performance parts Direct replacement for stock parts Hardened and surface ground for ultimate precision and durability Rocker Arm Stud Kit Extend the life of your cylinder heads Prevent damage to Rocker Arm Towers Install studs and safely re-torque nuts Black Oxide Finish 12 pt Nuts Head Bolt Kit Heat Treated 8640 Steel 200,000 psi Ultimate Tensile Strength 14% increases in strength over stock Stronger material than stock Head bolts Durable Black Oxide Coating 9/16" 12 point head with integral washer Formed threads Cold Formed Head Reusable Forged Roller Rocker Arms Forged from 8620 steel for greater strength Designed using Finite Element Analysis (FEA) Rollers eliminate thrusting on valves for decreased wear on the valve train Rocker geometry is better suited to high lift cams Bushings are 50% longer than stock, increasing time between rebuilds Larger surface area on the thrust surfaces reduces wear on the heads Oil is sprayed directly on the valve springs, reducing potential for breaking a valve due to over-heating (stock rockers tend to oil the rocker boxes, not the valves) Compatible with stock or S&S CNC heads 1.640 Ratio Capable of .650" max Valve Lift Serviceable and rebuildable for generations of durabilty A must have for cams with .550" or greater lift!

Roller Rocker Arms `17-up M8 There are extra stress issues that arise when big lift cams and high-pressure valve springs are installed.   it is essential that more durable components are used together to help you get the most out of your m8.Rocket cams forged roller rocker arms for m8 models are stronger, more durable and easier on the rest of your valvetrain, and are essential for increasing the longevity of your valvetrain components on cams with greater than.550" lift.

S&S Forged Roller Rocker Arm 86-17 HD Fits 1984-'17 HD® big twin engines, 1986-'19 HD® Sportster® models, and 1994-'02 Buell®. Our forged steel roller rocker arms were designed for superior strength and to eliminate the failure-prone stress areas found in some other rockers. S&S® roller rockers are forged from 8620 steel, heat-treated, and then shot-peened for additional strength and protection from fatigue. Our rockers also utilize 3/4" long bronze bushings, compared to the more common 1/2" long bushings or needle bearings. The end result is what we believe to be the finest rocker arm available anywhere, for any price. Extremely durable rollers reduce valve stem side thrusting with high lift cams. Superior wear and fatigue resistance even in the most demanding.(2 front and 2 rear rocker arms)

Kibblewhite Compression Release Building a big compression motor that needs a little relief to get fired up? Kibblewhite's got you covered with these state of the art compression releases. Features: Help reduce hot start issues and starter/battery loads Have 5-7 Newtons of closing force resistance Custom molded knobs ensure they stay cool to the touch and are easy to operate Require an M10 x 1.00 threaded hole for installation

Jims Rocker Arm Shaft Kit Features: In an effort to perfect Milwaukee-Eight® engine valve train geometry, while improving durability, JIMS® has developed performance rocker shafts and proprietary hardware The rocker arm shafts are precision machined from a low alloy nickel, chromium, molybdenum case hardened steel. The hardware flats on the end of the shafts are held to a .0005” parallel tolerance, assuring the rocker is seated in the correct position with the pushrod cup & valve stem tip when installed correctly

Feuling Rocking Shaft Kits Features: Gas nitrided and final surface treated Kit includes the shafts and our ARP bolts Recommended for all Twin Cam engines and especially for engines running higher lift camshafts and heavier valve spring pressures

S&S Rocker Arm Shaft Kit For Harley Durable quality replacements for the tired old stock ones. Don't replace your rocker arms without them. Kits covers front and rear intake and exhaust positions. Features: Replaces OEM# 17611-83 Sold as a set of 4 Made in the USA

S&S Rocker Shafts for M8 Models Features: Made in the U.S.A.

Feuling Rocker Shaft Kit Complete Custom tooling was created to provide a countersink relief for the bolt/nut head versus machining away the entire end of the shaft per the factory design, Recommended for all M-Eight engines and especially for engines running higher lift camshafts and heavier valve spring pressures, Over double the strength of factory rocker shafts, Gas nitrated and final surface treated, Precision ground from 4140HT steel, Designed with strength in mind, Made in the USA