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Premium Quality S&s 136" Big Bore Kit M8 ~ Selling Fast [rgEXl6fW]

$63.99 $204.99 -69%

S&S 136" Big Bore Kit M8 The S&S 136" Big Bore Kit M8 is a groundbreaking upgrade for your Milwaukee Eight® platform engine, designed to unlock unparalleled performance. Since the 1960s, S&S has been mastering the art of big bore kits, and this lates

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Premium Quality S&s 136" Big Bore Kit M8 ~ Selling Fast [rgEXl6fW]

S&S 136" Big Bore Kit M8

The S&S 136" Big Bore Kit M8 is a groundbreaking upgrade for your Milwaukee Eight® platform engine, designed to unlock unparalleled performance. Since the 1960s, S&S has been mastering the art of big bore kits, and this latest offering is no exception. Engineered with precision and high-quality materials, this kit is a game-changer for 2017 and newer big twins. With a 4.320" bore and a 4.625" stroker crank, it creates a massive 136 cubic inches of displacement, providing you with a tire-melting power increase. The kit is meticulously crafted to tighter tolerances than factory parts, ensuring a robust and reliable performance.

Key Features and Specifications

The S&S 136" Big Bore Kit M8 is packed with features that set it apart from the competition. It is designed to work seamlessly with stock crankcases, allowing for a hassle-free installation. The original engine serial numbers are retained, ensuring your bike maintains its identity while benefiting from the upgraded power. The kit includes a powder coat finish that matches the factory finish, maintaining the aesthetics of your motorcycle. Additional benefits include MLS (multi-layered steel) head gaskets, retention of stock engine height, and the inclusion of a 136" Cam Cover Badge. However, it is important to note that this kit requires a 4 5/8" Stroker Crank for optimal performance.

Practical Uses and Fitment

The S&S 136" Big Bore Kit M8 is a versatile upgrade that is ideal for riders looking to enhance the performance of their 2017+ Touring or 2018+ Softail models. This kit is not recommended for Trike models due to the lugging nature of the increased power. For a build of this caliber, it is highly advisable to consider the new S&S MK engine cases for even better results. Whether you're aiming for a more aggressive ride or looking to push the limits of your motorcycle, the S&S 136" Big Bore Kit M8 is the perfect choice. Remember, this kit is not legal for sale or use in California on pollution-controlled motor vehicles, so be sure to check local regulations before purchasing.

What Our Customers Say

January 21, 2026

Absolutely no complaints!

It's a solid tool that gets its job done well.

- Zane X..

January 21, 2026

Absolutely no complaints!

This is a nice, and a very, very useful item.

- Teri W..

January 21, 2026

Absolutely no complaints!

This is a really great and a very useful item.

- Samantha V..

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