WP475-M8 Drop-In

Close-up of a metal camshaft against a black background.

Description:

The WP475-M8 Harley-Davidson Milwaukee-Eight camshaft is Ward Performance’s highest-output drop-in option. Strong torque hits by 2,500 RPM, surges past 3,000, and pulls hard to 6,000—delivering the passing power serious street riders expect without sacrificing low-speed manners. A crisp, uneven idle makes its presence known, yet the cam stays civil for long highway miles. Install with adjustable pushrods, and unlock the M8’s full potential.

Key Features & Rider Benefits:

  • Drop-In Convenience: This is a bolt-in camshaft for many applications, making installation more straightforward.

  • Max Horsepower & Broad Torque: Engineered for a significant power boost across a wide RPM range.

  • Aggressive Street Performance: Perfect for riders who demand a responsive and powerful engine for spirited riding.

  • Exciting Sound Profile: Delivers a noticeable to aggressive and choppy lope, giving your M8 a distinctive performance sound.

  • Versatile Power Delivery: Enjoy smooth power for cruising and a strong, aggressive hit when you twist the throttle.

    • Effective RPM Range: 2500 - 6000 RPM

    • Recommended Engine Displacements:

      • Designed for stock 107", 114", & 117" M8 engines.

      • Will also work great with 124”-128” big bore kits for those seeking big low-end torque while still achieving great HP numbers.

    • Ideal Rider: The aggressive street rider.

    • Valve Lift (Intake & Exhaust): .475" / .475"

    • Effective RPM Range: 2500 - 6000 RPM

    • Recommended Engine Displacements: Stock 107", 114", 117" M8; also performs well in 124-128" big bore kits.

    • Intake Closes (ABDC @ .050"): 30 degrees

    • Exhaust Closes (ATDC @ .050"): 20 degrees

    • Intake Duration (@ .050" lift): 220 degrees

    • Exhaust Duration (@ .050" lift): 250 degrees

    • Overlap (@ .050" lift): 30 degrees

    • Lobe Separation Angle (LSA): 102.5 degrees

    • Intake TDC Lift (@ TDC): .124"

    • Exhaust TDC Lift (@ TDC): .165"

    • Recommended Static Compression Ratio(s): Stock to 11:1

    • Requires Adjustable Pushrods.

    • Performance Lifters Recommended. New lifters are recommended for optimal performance and durability.

    • Compatible with stock valve springs.

    • Compatible with stock components.

    • Performance Exhaust Recommended to achieve optimal results.

    • High Flow Air Cleaner Recommended.

    • A Full Professional Tune is Recommended for optimal performance and to ensure engine safety.

    • Not for VVT equipped models.

    • Stock lifter guides are okay.

    • Compatible with Harley-Davidson 2017 to current M8 engines.

    • Excludes VVT models.

    • Made in the USA.

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