S&S Rocker Arm Guardian Kit - M8

The S&S Rocker Arm Guardian Kit keeps your valvetrain strong and stable with performance cams and higher RPM. It is made from steel.

Fits Harley-Davidson Touring (2017-2023), Trike (2017-2023) and Softail (2018-2023) models. Check the fitment chart below to confirm your exact year and model.

• Rocker Arm shafts, Rocker Arm Stud Kit, Head Bolt Kit and Performance Roller Rocker Arms are included in this kit
• 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
• 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" max Valve Lift
• Serviceable and rebuildable for generations of durabilty
• A must have for cams with .550" or greater lift