S&S Cycle 129" Power Package Engine Performance Kit for M8

Elevate your Harley-Davidson Milwaukee-Eight 107" engine to a formidable 129" with the S&S Cycle Power Package Engine Performance Kit. This comprehensive big bore bolt-on upgrade delivers a significant boost in displacement and power, transforming your ride without requiring complex case machining.

Description

The S&S Cycle 129 engine performance kit is engineered to provide a substantial power increase for your 107" Milwaukee-Eight engine. This premium Harley-Davidson M8 big bore kit features massive 4.320" cylinders paired with durable 11.0:1 forged pistons, ensuring robust performance and longevity. A key advantage of this S&S Cycle 129 engine performance kit is its bolt-on design, eliminating the need for any case machining and making installation more straightforward. The kit includes an advanced S&S oil pump and cam plate with independent scavenge sections for both the flywheel cavity and cam chest, optimizing oil flow and scavenging efficiency. Debris screens in the scavenge pickups and a magnet in the cam chest further protect your engine by preventing contaminants from entering the oil pump. The adjustable pressure relief valve can even be fine-tuned while installed. Complementing the big bore setup are S&S Quickee pushrods with tubes, premium tappets, and billet aluminum hard-anodized black coated tappet cuffs. High-performance conical single wire valve springs, designed to work with cams up to 0.605" lift, are also included. At the heart of this high performance engine upgrade is the S&S Cycle HPT496 cam, specifically designed for big bore applications to maximize horsepower and torque. All components are meticulously crafted in the USA, ensuring exceptional quality and reliability. This bolt-on power package is designed to retain stock engine height, works seamlessly with stock crankcases, and is compatible with both stock and S&S roller rocker arms, preserving your original engine serial numbers.

Features & Highlights

• Experience a significant power boost with the S&S Cycle 129 engine performance kit, transforming your 107" Milwaukee-Eight into a high-performance 129" powerhouse. This true bolt-on big bore solution requires no case machining, simplifying installation and getting you back on the road faster.
• Equipped with robust 4.320" big bore cylinders and durable 11.0:1 forged pistons, this kit ensures exceptional strength and longevity, built to withstand the demands of increased displacement and power.
• The included S&S oil pump and cam plate feature independent scavenge sections for superior oil management, along with debris screens and a cam chest magnet to protect critical engine components from contamination, ensuring optimal lubrication and extended engine life.
• Optimize your valvetrain with S&S Quickee pushrods, premium tappets, billet aluminum tappet cuffs, and high-performance conical valve springs, designed to support cams up to 0.605" lift for maximum power potential.
• Harness the full potential of your big bore setup with the specially engineered HPT496 cam, meticulously designed to deliver optimal horsepower and torque gains for this displacement, providing a thrilling ride experience.
• Proudly Made in the USA, this S&S Cycle power package maintains stock engine height and is compatible with stock crankcases and rocker arms, ensuring seamless integration and preserving your original engine serial numbers.

Technical Specifications

• Type: Engine Performance Kit
• Model: HPT496 Series
• Bore Size: 4.320"
• Displacement: 129"
• Compression Ratio: 11.0:1
• Cam Drive Type: Chain
• Cooling System: Oil Cooled
• Color/Finish: Black, Highlighted Fins
• Vendor Part Number: 310-1396
• Made in USA: Yes

Free shipping to GLS parcel shop parcel box for purchases over DKK 1,000.

GLS home delivery costs DKK 59.

We do our best to ship your order as quickly as possible. All orders are generally packed within 24 hours on weekdays.

There is a 14-day return policy. Read more