Rocket Performance Garage Llc Roller Rocker Arms - M8 `2017-2024 — Harley-Davidson (2017-2024)

Rocket Performance Garage forged roller rocker arms for Harley Milwaukee-Eight engines, engineered to handle high-lift cams and aggressive valve spring pressures without sacrificing longevity. Built from 8620 steel with a 1.640 ratio geometry optimized for cams exceeding .550" lift and rated to .650" maximum valve lift.

Features

• 8620 forged steel construction for strength
• Roller design eliminates thrust wear on valves
• 1.640 rocker ratio optimized for high-lift cams
• 50% longer bushings than stock for extended rebuild intervals
• Direct oil spray to valve springs reduces thermal failure risk
• Larger thrust surface area reduces head wear
• Capable of .650" maximum valve lift

Specifications

• Brand: Rocket Performance Garage
• Manufacturer Part #: 7-7201
• Length: 8 in
• Width: 8 in
• Height: 4 in
• Weight: 4 lbs

Fitment

Fits Harley-Davidson Milwaukee-Eight (M8) models 2017–2024. Recommended for engines running cams with .550" lift or greater.

Frequently Asked Questions

Do I need these rockers if I'm running a stock cam?

No. Stock rockers are adequate for factory cams. These are engineered for high-lift performance cams (.550" lift and above).

What's the maximum valve lift these can handle?

Rocket rockers are rated to .650" maximum valve lift, making them compatible with aggressive aftermarket cam profiles.

How do longer bushings affect performance?

Longer bushings (50% longer than stock) increase the time between rebuilds and reduce rocker wear under high-lift stress.

Will these work on my 2015 or older M8?

This part is designed for 2017–2024 M8 engines. Verify fitment with the manufacturer if you have an older model.

Do I need to re-tune after installing these rockers?

Rockers alone do not require remapping. Your tuning strategy depends on your complete cam and head package.