Product Description
Inspired by Pro Stock Drag Race engines, these 4" Big Bore kits from S&S Cycle delivery a serious punch of power in a bolt-on application. Silver finish,.
Fits: 1999-2006 Harley Twin Cam Models (Except '99 Softail Models)
- Bolt in - no machining, balancing, or splitting the crankcases; install can be performed with engine still in frame
- Cast Ductile Iron Sleeve in cast aluminum for superior heat transfer
- 88" engines are boosted to 100"
- 10.5:1 compression (w/ stock 85cc heads) makes for a very streetable and dependable engine that also responds well to performance cams
- Complete kits include cylinders, forged pistons, rings, piston pins, clips and gaskets
DISCLAIMER: NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES.
*Not compatible with S&S 79cc Super Stock® heads
| Stroke | Bore | Cylinder Length | Piston Type | Dome Volume | 83cc CNC Heads | 85cc Stock Heads | 89cc S&S Heads |
| 4 | 4.00" | 4.937" | Forged | 8.75 pop up | 10.8:1 | 10.5:1 | 10.1:1 |
Additional Information
| MPN | 910-0642 |