S&S Cycle Performance POWER PACK; 117CI->128CI M817UP

The S&S Cycle 124" Power Package transforms your 107" M8 Harley engine into a high-performance 124 cubic inch powerhouse. This complete bolt-on package includes everything you need for increased displacement, improved oil flow, and precision-matched components for maximum reliability and performance.

FEATURES

• Increases 107" M8 engine to 124" with 4.25" bore cylinders

• Forged pistons with 11:1 compression ratio

• Wrinkle black finish, with or without fin highlighting

• S&S oil pump/cam plate with blue anodized finish, removable passage plugs, and independent scavenge sections

• Debris screens in both scavenge pickups and magnet in cam chest to reduce contamination

• Increased oil flow on both feed and scavenge sides

• Adjustable pressure relief valve for easy tuning with the unit installed

• Quickee pushrods with pushrod tubes

• S&S premium tappets

• Hard-anodized black billet aluminum tappet cuffs for improved stability at high lift and high RPM

• S&S 550 cams designed for big bore applications (gear or chain drive options available)

• High-performance valve springs, compatible with cams up to .605" lift, conical single-wire design

• Complete bolt-on installation with all necessary gaskets, bearings, and hardware

• Made in the USA

DETAILS

• 550 Cam Timing & Specs:

  • Front Intake Open/Close: 9.4° / 29.4°

  • Front Exhaust Open/Close: 62.5° / 30.5°

  • Rear Intake Open/Close: 3.1° / 31.1°

  • Rear Exhaust Open/Close: 59.4° / 38.4°

  • Front Intake Duration: 218.9° | Rear Intake Duration: 214.2°

  • Front Exhaust Duration: 273.1° | Rear Exhaust Duration: 277.8°

  • Intake & Exhaust Lift: .550"

  • Front Intake Lobe Centerline: 100.0° | Front Exhaust: 106.0°

  • Rear Intake Lobe Centerline: 104.0° | Rear Exhaust: 100.5°

  • Front Intake Lift at TDC: .127" | Front Exhaust Lift at TDC: .232"

  • Rear Intake Lift at TDC: .099" | Rear Exhaust Lift at TDC: .264"

  • Front Overlap: 39.9° | Rear Overlap: 41.5°

This package ensures a perfectly matched setup for ultimate performance, reliability, and long-lasting power gains.