S&S Cycle Rocker Arm Guardian KT M8

Rocker Arm Stud Kit

Replace broken or worn OEM pieces with stronger, more durable S&S performance parts

Hardened and surface ground for ultimate precision and durability

Rocker Arm Shafts

Direct replacement for stock parts

Prevent damage to Rocker Arm Towers

Extend the life of your cylinder heads

Install studs and safely re-torque nuts

Rocker Arm shafts, Rocker Arm Stud Kit, Head Bolt Kit and Performance Roller Rocker Arms are included in this kit

Black Oxide Finish

Head Bolt Kit

Heat Treated 8640 Steel

12 pt Nuts

200,000 psi (EU: 1378,95 MPa) ultimate tensile strength

14% increases in strength over stock

9/16" (EU: 1,43 cm) 12-point head with integral washer

Formed threads

Durable Black Oxide Coating

Cold Formed Head

Forged from 8620 steel for greater strength

Forged Roller Rocker Arms

Designed using Finite Element Analysis (FEA)

Rollers eliminate thrusting on valves for decreased wear on the valve train

Stronger material than stock Head bolts

Rocker geometry is better suited to high lift cams

Larger surface area on the thrust surfaces reduces wear on the heads

Bushings are 50% longer than stock, increasing time between rebuilds

Compatible with stock or S&S CNC 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)

1.640 Ratio

Capable of .650" (EU: 1,65 cm) max Valve Lift

Serviceable and rebuildable for generations of durabilty

A must have for cams with .550" (EU: 1,40 cm) or greater lift

Reusable