S&S 910-0844 129″ Big Bore Kit Wrinkle Black for M8 Models:
The biggest Big Bore possible with a drop-in kit! This S&S cylinder and piston kits takes your 107″ M8 to 129″ and the 114″ to 132″.
- Huge bore increase means huge power increase
- Works with stock crankcases (no machine work)
- Powder coat finish matches factory finish
- MLS (multi-layered steel) head gaskets
- 4.320″ Bore, 4.375″ Stroke
- Retains stock engine height
- Includes Cubic Inch Cam Cover Badge
- Made in USA
- Must be used with S&S Cycle’s stroker flywheels to achieve 136″ displacement (part # 320-0605)
- This project requires a skilled technician. It is the responsibility of the person assembling the parts to check all clearances and assembly specifications.
- We highly recommend using Feuling’s ARP Cylinder Stud kit during install to avoid reusing stretched stock cylinder studs.
Important Information (MUST READ):
*A ThunderMax Autotune System is highly recommended for this product if you do not already have an aftermarket tuner. If you have one already, we can also provide you a recommended base map if you purchase this kit.*