![S&S CYCLES-128" Big Bore Cylinder Kit for 114" and 117" / M8-Big Bore Kit-MetalCore Harley Supply](http://metalcoresupply.com/cdn/shop/products/128-big-bore-cylinder-kit-for-114-and-117-m8-481896.png?v=1681595349&width=1054)
![S&S CYCLES-128" Big Bore Cylinder Kit for 114" and 117" / M8-Big Bore Kit-MetalCore Harley Supply](http://metalcoresupply.com/cdn/shop/products/128-big-bore-cylinder-kit-for-114-and-117-m8-415498.png?v=1681595349&width=1054)
![S&S CYCLES-128" Big Bore Cylinder Kit for 114" and 117" / M8-Big Bore Kit-MetalCore Harley Supply](http://metalcoresupply.com/cdn/shop/products/128-big-bore-cylinder-kit-for-114-and-117-m8-800380.png?v=1681595349&width=1054)
128" Big Bore Cylinder Kit for 114" and 117" / M8
Tax excluded. Shipping calculated at checkout
- Fits 17 - 21 114" and 117" M8 making it a 128"
- The Big Bore kit yields excellent results with stock cylinder heads
- Easy installation: no need to bore or split existing cases, just swap the cylinders
- Cylinders are constructed from premium aluminum castings with cast-in iron liners
- Kits include cylinders, pistons, rings and gaskets (head, base and exhaust)
- Black or silver powder-coat finish
- Made in the U.S.A.
- This project requires a skilled technician. It is the responsibility of the person assembling the parts to check all clearances and assembly specifications.
Choose options
![S&S CYCLES-128" Big Bore Cylinder Kit for 114" and 117" / M8-Big Bore Kit-MetalCore Harley Supply](http://metalcoresupply.com/cdn/shop/products/128-big-bore-cylinder-kit-for-114-and-117-m8-481896.png?v=1681595349&width=1054)
![S&S CYCLES-128" Big Bore Cylinder Kit for 114" and 117" / M8-Big Bore Kit-MetalCore Harley Supply](http://metalcoresupply.com/cdn/shop/products/128-big-bore-cylinder-kit-for-114-and-117-m8-415498.png?v=1681595349&width=1054)
![S&S CYCLES-128" Big Bore Cylinder Kit for 114" and 117" / M8-Big Bore Kit-MetalCore Harley Supply](http://metalcoresupply.com/cdn/shop/products/128-big-bore-cylinder-kit-for-114-and-117-m8-800380.png?v=1681595349&width=1054)
128" Big Bore Cylinder Kit for 114" and 117" / M8
Sale price$1,561.95 USD
Regular price