S&S Cycle M8 Power Package - 4.320" Bore - 132ci - 310-1400

Unleash the full potential of your Harley-Davidson Milwaukee-Eight engine with the S&S Cycle 132" Power Package Engine Performance Kit. This comprehensive bolt-on solution transforms your 114" or 117" M8 with a 4.50" stroke into a formidable 132" powerhouse, all without requiring any complex case machining. Experience a significant boost in torque and horsepower, designed for riders who demand ultimate performance.

Description

The S&S Cycle 132" Power Package is engineered for peak performance and durability, offering a seamless upgrade for your Milwaukee-Eight. At its heart are big bore 4.320" cylinders paired with robust 11.0:1 forged pistons, meticulously designed to increase displacement and compression for exhilarating power delivery. This engine upgrade kit features an advanced S&S oil pump and cam plate, incorporating independent scavenge sections for both the flywheel cavity and cam chest, ensuring optimal lubrication and debris management. Unique features like debris screens in both scavenge pickups and a magnet in the cam chest prevent harmful particles from entering the oil pump, extending engine life. With increased oil flow capacity on both the oil feed and scavenge sides, and an adjustable pressure relief valve, this kit provides superior oil system performance. Installation is streamlined with Quickee pushrods and tubes, S&S premium tappets, and billet aluminum hard-anodized black coated tappet cuffs. The high-performance HPT496 cam, specifically designed for big bore applications, works in harmony with S&S valve springs capable of handling up to 0.605" lift, featuring a conical single wire design for reliability. An MLS (multi-layered steel) head gasket ensures a tight, durable seal. This bolt-on power package retains stock engine height and works flawlessly with stock crankcases, roller rocker arms, and valve springs (both first and second generation), making it a truly integrated Harley-Davidson M8 big bore kit upgrade. The kit features a sleek Black Granite finish and is water-cooled for consistent performance.

Features & Highlights

• Massive Displacement Upgrade: Transform your 114"/117" Milwaukee-Eight into a commanding 132" engine, delivering a substantial increase in power and torque without the need for case machining.
• Optimized Oil System: Features an advanced S&S oil pump/cam plate with independent scavenge sections, debris screens, and a cam chest magnet, ensuring superior lubrication and protection against contaminants.
• High-Performance HPT496 Cam: Includes an HPT496 cam specifically engineered for big bore applications, paired with S&S valve springs designed for cams up to 0.605" lift, maximizing engine efficiency and power output.
• Premium Forged Pistons & Cylinders: Equipped with big bore 4.320" cylinders and 11.0:1 forged pistons, built for extreme durability and optimal compression ratio to handle increased power.
• Quick & Easy Installation: Designed as a bolt-on power package with Quickee pushrods and tubes, allowing for a straightforward upgrade process while retaining stock engine height and original serial numbers.
• Enhanced Durability Components: Features S&S premium tappets, hard-anodized billet aluminum tappet cuffs, and an MLS head gasket for robust, long-lasting performance.
• Made in the USA Quality: Proudly manufactured in the USA, ensuring exceptional craftsmanship and reliability for your motorcycle's engine.

Technical Specifications

• Type: Engine Performance Kit
• Model: Power Package (HPT496 Series)
• Bore Size: 4.320"
• Displacement: 132"
• Compression Ratio: 11.0:1
• Cam Drive Type: Chain
• Cooling System: Water Cooled
• Pushrod Tubes: Chrome
• Color/Finish: Black Granite
• Vendor Part Number: 310-1400

Important to Know

• This kit is designed for 114" and 117" Milwaukee-Eight engines with a 4.50" stroke.
• Works with stock crankcases.
• Compatible with both stock and S&S roller rocker arms.
• Compatible with stock valve springs (first and second generation).
• Original engine serial numbers are retained after installation.