S&S Cycle Rocker Arms — Harley-Davidson Street Glide, Softail Fat Boy 114, Road King Special (2017-2026)

S&S Cycle rocker arms for Harley-Davidson M8 engines, engineered to handle high-lift cams exceeding 0.550" lift without premature wear. Direct OEM replacement that increases valvetrain durability and longevity on modified engines.

Features

• Hardened and surface-ground construction
• Designed for cams with greater than 0.550" lift
• Direct replacement for stock rocker arms
• Increased durability over OEM components

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 900-1090
• Weight: 1.7 lb
• Category: Engine Components / Rocker Arms

Fitment

Fits Harley-Davidson M8 engines, especially recommended for builds using high-lift performance camshafts.

Frequently Asked Questions

Will these work with stock cams?

Yes, they're a direct OEM replacement. They're engineered to handle aggressive cams over 0.550" lift without accelerated wear.

Do I need new pushrods or lifters?

Rocker arms alone will bolt in as a direct swap. Check your valvetrain components for wear if upgrading to high-lift cams.

What's the weight per arm?

1.7 lbs total weight for the set. Exact distribution depends on your specific M8 configuration.

Are these street-legal?

Yes — rocker arms are internal engine components with no emissions or noise impact.