S&S Cycle #900-1092 - Rocker Arm Guardian Kit - M8

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 ShaftsReplace broken or worn OEM pieces with stronger, more durable S&S performance partsDirect replacement for stock partsHardened and surface ground for ultimate precision and durability
Rocker Arm Stud KitExtend the life of your cylinder headsPrevent damage to Rocker Arm TowersInstall studs and safely re-torque nutsBlack Oxide Finish12 pt Nuts
Head Bolt KitHeat Treated 8640 Steel200,000 psi Ultimate Tensile Strength14% increases in strength over stockStronger material than stock Head boltsDurable Black Oxide Coating9/16" 12 point head with integral washerFormed threadsCold Formed HeadReusable
Forged Roller Rocker ArmsForged from 8620 steel for greater strengthDesigned using Finite Element Analysis (FEA)Rollers eliminate thrusting on valves for decreased wear on the valve trainRocker geometry is better suited to high lift camsBushings are 50% longer than stock, increasing time between rebuildsLarger surface area on the thrust surfaces reduces wear on the headsOil 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 heads1.640 RatioCapable of .650" max Valve LiftServiceable and rebuildable for generations of durabiltyA must have for cams with .550" or greater lift!

Fitment