S&S Cycle 132" Power Package Engine Kit for M8

Unleash massive power from your Harley-Davidson M8 with the S&S Cycle 132" engine performance kit. This bolt-on big bore kit transforms your 114" or 117" engine with a 4.50" stroke into a formidable 132" powerhouse, all without requiring any case machining.

Description

Engineered for motorcycle enthusiasts demanding peak performance, this Harley-Davidson M8 big bore kit delivers a significant displacement increase to 132". Featuring a big bore 4.320" cylinder paired with durable 11.0:1 forged pistons, this kit ensures a substantial boost in horsepower and torque. The comprehensive package includes an advanced S&S oil pump and cam plate system with independent scavenge sections for the flywheel cavity and cam chest, ensuring optimal lubrication and debris management with integrated screens and a cam chest magnet. Experience consistent oil pressure thanks to increased flow capacity and an adjustable pressure relief valve, which can be fine-tuned even with the unit installed.

Installation is streamlined with Quickee pushrods and tubes, complemented by S&S premium tappets and hard-anodized, black-coated billet aluminum tappet cuffs. The high-performance conical single wire S&S valve springs are designed to accommodate cams up to 0.605" lift, perfectly matched with the HPT496 cam specifically engineered for big bore applications. This S&S Cycle HPT496 cam kit retains your stock engine height and works seamlessly with stock crankcases, stock or S&S roller rocker arms, and original engine serial numbers. A multi-layered steel (MLS) head gasket ensures a robust seal, making this motorcycle engine upgrade a reliable and powerful choice. Proudly made in the USA, this kit includes a distinctive 132 cam cover badge to showcase your enhanced performance.

Features & Highlights

• Effortless Power Boost: Upgrade your 114"/117" M8 engine with 4.50" stroke to a massive 132" displacement through a straightforward bolt-on installation, completely eliminating the need for complex and costly case machining.
• Optimized Oiling System: Features an S&S oil pump/cam plate with independent scavenge sections, debris screens, and a cam chest magnet to ensure superior lubrication, prevent contamination, and maintain engine longevity.
• Precision Engineered Components: Includes high-quality 4.320" big bore cylinders, 11.0:1 forged pistons, Quickee pushrods, premium tappets, and billet aluminum tappet cuffs for exceptional durability and performance.
• Advanced Cam and Valve Train: Comes with the HPT496 cam designed for big bore applications and S&S high-performance conical valve springs capable of handling up to 0.605" lift, delivering optimal valve timing and power delivery.
• Seamless Integration & Compatibility: Retains stock engine height, works with stock crankcases, and is compatible with both stock and S&S roller rocker arms and stock valve springs, preserving original engine serial numbers.
• Made in the USA Quality: Manufactured with pride in the USA, ensuring top-tier craftsmanship and reliability, complete with a distinctive 132 cam cover badge.

Technical Specifications

• Brand: S&S Cycle
• Product Name: Power Package
• Type: Engine Performance Kit
• Model: HPT496 Series
• Displacement: 132"
• Bore Size: 4.320"
• Compression Ratio: 11.0:1
• Cam Drive Type: Chain
• Cooling System: Water Cooled
• Color/Finish: Black, Highlighted Fins
• Features: Chrome Pushrod Tubes
• Units: Kit
• Vendor Part Number: 310-1401

Important to Know

This kit is designed for Harley-Davidson M8 engines with 114" or 117" displacement and a 4.50" stroke. It works with stock crankcases, retains stock engine height, and is compatible with both stock and S&S roller rocker arms. Original engine serial numbers are preserved. While compatible with stock valve springs, the included S&S valve springs are optimized for the HPT496 cam and higher lift applications.