Rocker Arm Guardian Kit / M8

Features of the Rocker Arm Guardian Kit

• Rocker arm shafts, rocker arm stud kit, head bolt kit and performance roller rocker arms are all included in this kit
• Replace broken or worn OEM pieces with stronger, more durable S&S performance parts
• Made in the U.S.A.

What Is In the Kit

• Rocker Arm Shafts. Direct replacement for stock parts, hardened and surface ground for precision and durability
• Rocker Arm Stud Kit. Extends the life of your cylinder heads and prevents damage to the rocker arm towers, so studs can be installed and nuts safely re-torqued. Black oxide finish, 12 point nuts
• Head Bolt Kit. Heat treated 8640 steel at 200,000 psi ultimate tensile strength, a 14% increase in strength over stock. 9/16" 12 point head with integral washer, formed threads, cold formed head, black oxide coating, reusable
• Forged Roller Rocker Arms. Forged from 8620 steel and designed using Finite Element Analysis. Rollers eliminate thrusting on the valves for decreased valve train wear, and the rocker geometry suits high lift cams. Bushings are 50% longer than stock. Oil is sprayed directly on the valve springs rather than into the rocker boxes. 1.640 ratio, capable of .650" maximum valve lift

Fitment

• 2017-2021 Harley-Davidson Milwaukee-Eight, covering the '17-'21 Touring and the '18-'21 Softail
• Compatible with stock or S&S CNC heads
• A must have for cams with .550" or greater lift
• Serviceable and rebuildable