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In Stock S&s Cycle 129" Power Package Engine Performance Kit - Gear Drive - Oil Cooled - Non-highlighted Fins - M8 - 310-1228 Flash Sale: 45% Off [hf53A6sO]

$142.99 $457.99 -69%

129" Power Package Engine Performance Kit Unveiled The S&S CYCLE 129" Power Package Engine Performance Kit is a game-changer for Harley-Davidson enthusiasts seeking to enhance their engine's performance without any case machining. This kit transforms

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129" Power Package Engine Performance Kit Unveiled

The S&S CYCLE 129" Power Package Engine Performance Kit is a game-changer for Harley-Davidson enthusiasts seeking to enhance their engine's performance without any case machining. This kit transforms a 107" oil-cooled M8 engine into a powerful 129" engine, offering unparalleled power and torque. With its gear drive, oil cooling, and non-highlighted fins, this kit is designed to provide a seamless upgrade that is both efficient and visually appealing.

Comprehensive Performance Enhancements

The Power Package Engine Performance Kit is meticulously crafted to ensure maximum performance. It includes big bore cylinders that come with a matching cam, cam plate, and oil pump, guaranteeing optimal engine efficiency. The independent scavenge sections for the flywheel cavity and cam chest are designed to enhance oil flow and reduce wear. Additionally, a magnet in the cam chest helps prevent debris from entering the oil pump, further safeguarding your engine's longevity. This kit also features high-performance conical single-wire S&S valve springs, ensuring smooth and reliable engine operation. The original engine serial numbers are retained, and passage plugs are removable for easy servicing.

Perfect for Harley-Davidson Enthusiasts

The S&S CYCLE 129" Power Package Engine Performance Kit is a must-have for Harley-Davidson riders looking to boost their motorcycle's performance. Its compatibility with various Harley-Davidson models, including Softail Low Rider ST, Road Glide ST, Street Glide ST, and more, makes it a versatile upgrade solution. Whether you're a daily rider or a weekend warrior, this kit offers numerous benefits, such as increased power, improved fuel efficiency, and enhanced overall ride quality. With its Made in the USA quality and Mfg No. 310-1228, you can trust that this kit is built to last and deliver exceptional performance. Upgrade your Harley-Davidson today with the S&S CYCLE 129" Power Package Engine Performance Kit and experience the thrill of a more powerful ride.

What Our Customers Say

January 1, 2026

Absolutely no complaints!

This is a really good and a very solid product.

- Mindy N..

January 1, 2026

Absolutely no complaints!

This is a very well-made, and very fine tool.

- Kyleigh M..

January 1, 2026

Absolutely no complaints!

The craftsmanship is evident in each detail.

- Genesis S..

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