Categories
Best sellers
Regular price
$779.99 USD
Regular price
$779.99 USD
$899.00 USD
Sidebar
Ask a Question
S&S Cycle 129" Power Package HPT496 for Harley Davidson M8 Engines - Gear Drive, Oil Cooled, Black with Highlights
Regular price $3,497.95 USD
129" Power Package - HPT496 - Gear Drive - Oil Cooled - Black with Highlights - 107" M8 Upgrade your Harley Davidson...
Lease for as low as $/week
QUESTIONS & ANSWERS
Have a Question?
Be the first to ask a question about this.
Category:
129" Power Package - HPT496 - Gear Drive - Oil Cooled - Black with Highlights - 107" M8
Upgrade your Harley Davidson M8 engine with the S&S Cycle 129" Power Package HPT496, designed to enhance performance while maintaining stock engine height and compatibility. This comprehensive kit increases your engine's displacement from 107 inches to 129 inches without requiring case machining, providing a significant boost in power and torque for street or performance applications. The package includes a big bore 4.320-inch cylinder with forged pistons featuring an 11.0:1 compression ratio, ensuring durability and high performance under demanding conditions. The kit also incorporates an S&S oil pump and cam plate, along with removable passage plugs for easy servicing, and debris screens in both scavenge pickups to protect vital components. An integrated magnet in the cam chest helps prevent debris from entering the oil pump, promoting longer engine life. The oil flow capacity is increased on both the feed and scavenge sides, ensuring optimal lubrication during high-performance operation. The adjustable pressure relief valve allows fine-tuning with the unit installed in the engine, providing flexibility to match your specific needs. Quickee pushrods with pushrod tubes, S&S premium tappets, and hard anodized, black-coated billet aluminum tappet cuffs contribute to reliable valve operation. The kit features S&S valve springs compatible with cams up to 0.605 inches lift, employing a high-performance conical single wire spring design for durability and stability. The included HPT496 cam is specifically designed for big bore applications, enhancing horsepower and torque. Multi-layered steel head gaskets ensure reliable sealing, and the package includes a 129 cam cover badge for a finished look. Made in the USA, this package retains the original engine serial numbers and works seamlessly with stock crankcases, valve springs—both first and second generation—and stock or S&S roller rocker arms. This upgrade preserves the stock engine height and maintains compatibility across various components, making it an ideal choice for riders seeking a high-performance yet reliable upgrade for their Harley Davidson M8 engine.
Features:
- Increases engine displacement from 107" to 129" without case machining
- Big bore 4.320" cylinder with forged pistons, 11.0:1 compression ratio
- Includes S&S oil pump and cam plate with removable passage plugs for servicing
- Debris screens in both scavenge pickups and magnet in cam chest to prevent debris entry
- Enhanced oil flow capacity on feed and scavenge sides for improved lubrication
- Adjustable pressure relief valve for fine-tuning oil pressure
- Quickee pushrods with pushrod tubes and S&S premium tappets for reliable valve operation
- Black anodized, hard-coated billet aluminum tappet cuffs for durability
- S&S valve springs designed for cams up to 0.605" lift, utilizing high-performance conical spring design
- HPT496 cam optimized for big bore applications to maximize horsepower and torque
- MLS (multi-layered steel) head gasket for secure sealing
- Includes 129" cam cover badge for aesthetic finish
- Made in the USA with compatibility for stock and aftermarket components
