Description
The S&S Cycle T143 is purpose-built for riders who demand maximum performance without sacrificing chassis compatibility. At double the horsepower of a stock motor, this ultra-performance long-block delivers the displacement and power necessary to dominate the track—while fitting into your existing frame with zero modifications. This is a race-proven powerplant designed for experienced builders and riders who understand that extreme performance demands precision tuning, technical expertise, and acceptance of the trade-offs inherent to maximum output.
Built entirely in the USA, the T143 features CNC-machined S&S B3 cylinder heads, a high-flow oil pump, and S&S 635 gear drive cams paired with 1.725:1 rocker arms for .674″ of total valve lift. The three-piece flywheels, super stock T2 crankcases with reed breather valve, and premium high-performance tappets ensure durability under extreme load. Note that this engine requires a separate carburettor/intake system, ignition components, T143-specific or custom exhaust, and an oil line installation kit—making it essential to plan your build with a qualified technician.
- 143 cubic inches displacement
- 10.47:1 compression ratio
- CNC-machined B3 cylinder heads
- Two-bolt exhaust flanges
- Super stock T2 crankcases
- Reed breather valve
- Three-piece flywheels
- S&S high-flow oil pump
- S&S 635 gear drive cams
- 1.725:1 rocker arms
- .674″ total valve lift
- Premium high-performance tappets
- Wrinkle black finish
- Fits stock chassis—no modifications
- Made in USA
- One-year warranty
- Not compatible with HD Softail
Wire transfer required to order. Does not ship free. Call to order 231-767-5055. Excluded from additional discounts.
