S&S Cycle M8 Power Pack Engine Performance Kit - 129ci - 310-1398A

Elevate your Harley-Davidson Milwaukee-Eight engine's performance to exhilarating new levels with the S&S Cycle 129" M8 Power Pack Kit. This comprehensive big bore bolt-on kit is specifically engineered for M8 models, including those equipped with Variable Valve Timing (VVT), offering a significant displacement increase and a host of high-performance components designed for maximum power and reliability.

Description

The S&S Cycle 129" M8 Power Pack Kit is the ultimate solution for riders seeking a substantial power upgrade without the hassle of complex modifications. This innovative kit transforms your 107" Milwaukee-Eight engine into a commanding 129" beast, all without requiring any case machining. At its core is the advanced S&S oil pump and cam plate, featuring independent scavenge sections for both the flywheel cavity and cam chest, ensuring optimal oil evacuation and reduced oil carry-over. Enhanced with debris screens in both scavenge pickups and a strategically placed magnet in the cam chest, this system actively prevents harmful contaminants from reaching the oil pump. Riders will appreciate the increased oil flow capacity on both the feed and scavenge sides, complemented by an adjustable pressure relief valve that can be fine-tuned even while installed in the engine.

Beyond superior oil management, this S&S Cycle performance kit includes Quickee pushrods with accompanying pushrod tubes, S&S premium tappets, and robust S&S hard anodized, black coated billet aluminum tappet cuffs for exceptional durability. High-performance conical single wire valve springs are included, capable of accommodating cams with up to 0.605" lift, ensuring compatibility with the included 496 camshaft. A multi-layered steel (MLS) head gasket provides a reliable seal for the increased compression. Designed and made in the USA, this kit retains your stock engine height, works seamlessly with stock crankcases and both stock or S&S roller rocker arms, and ensures your original engine serial numbers are preserved, making it a truly integrated and powerful upgrade for your Harley-Davidson Milwaukee-Eight big bore project.

Features & Highlights

• Effortless Big Bore Upgrade: Transform your 107" Milwaukee-Eight into a powerful 129" engine with a direct bolt-on kit, specifically designed for M8 models including VVT, requiring no case machining and retaining your original engine serial numbers.
• Optimized Oil System: Features an S&S oil pump/cam plate with independent scavenge sections for superior oil evacuation, debris screens, a cam chest magnet for contaminant prevention, and increased oil flow capacity for enhanced engine longevity.
• Adjustable Performance: The adjustable pressure relief valve allows for fine-tuning of oil pressure even after installation, providing precise control over your engine's lubrication system.
• Durable Valvetrain Components: Includes S&S Quickee pushrods, premium tappets, and hard anodized black billet aluminum tappet cuffs for robust and reliable valve operation under high-performance conditions.
• High-Performance Valve Springs & Camshaft: Equipped with high-performance conical single wire valve springs supporting up to 0.605" lift and the aggressive S&S 496 camshaft for significant power gains.
• Precision Sealing: Comes with an MLS (multi-layered steel) head gasket, ensuring a durable and reliable seal for increased compression and performance.

Technical Specifications

• Brand: S&S Cycle
• Engine Compatibility: Harley-Davidson Milwaukee-Eight (M8) models, including VVT
• Displacement Increase: 107" M8 to 129"
• Camshaft Included: S&S 496 Camshaft
• Valve Spring Max Lift: 0.605"
• Tappet Cuffs Material: Billet Aluminum, Hard Anodized, Black Coated
• Head Gasket Type: MLS (Multi-Layered Steel)
• Case Machining Required: No
• Retains Stock Engine Height: Yes
• Works with Stock Crankcases: Yes
• Works with Stock/S&S Roller Rocker Arms: Yes
• Original Engine Serial Numbers Retained: Yes
• Made in: USA
• EAN: 09040231