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

S&S Cycle intake runner for Harley-Davidson Milwaukee-Eight engines, engineered to improve intake flow and engine breathing response. Direct replacement for the stock M8 intake manifold runner.

Features

• Designed for Milwaukee-Eight (M8) engine architecture
• Direct replacement for stock intake runner
• Optimized for improved intake flow

Specifications

• Brand: S&S Cycle
• Manufacturer Part #: 170-0643
• Weight: 2.5 lbs
• Category: Air Intake Systems / Air Intake Components

Fitment

Fits Harley-Davidson Milwaukee-Eight (M8) engines.

Frequently Asked Questions

Will this fit my Twin Cam Harley?

No — this runner is engineered specifically for Milwaukee-Eight (M8) engines. Twin Cam models require a different part number.

Is this a direct bolt-on replacement?

Yes. It replaces the stock M8 intake manifold runner without modifications required.

Will I need to rejet or tune my bike with this intake runner?

Intake modifications can affect fuel delivery. Consult with S&S Cycle or a Harley tuner to determine if your bike needs a fuel map adjustment.

What weight does this add to my engine?

The runner weighs 2.5 lbs and replaces the factory unit, so there is no net weight gain.