The S&S Street Pro engine was first introduced as part of the Tribute 145 finale in August of 2003, at the Broken Spoke Saloon in Sturgis, SD. A Street Pro bike built by S&S, G2 Motorsports and Gail's Harley-Davidson® was a result of George Smith's desire to build a big bore competition engine for 1999-up big twins and Brett Smith's desire to pay tribute to S&S Cycle's racings roots.
S&S and Star Racing offer a number of engine packages designed for competition in the AHDRA Street Pro Class ranging from 120" to 139" (the 120" is also AHDRA Pro Mod legal). All S&S Street Pro engines are 45° v-twins, built with the S&S TCSA crankcases including the S&S gear drive cams.
The S&S Street Pro Engines are available with rear motor mounts for either 1984-'99 chassis or for 1999-up chassis. Engines with the 1999-up style rear motor mount are intended for use with Harley-Davidson® transmission for 1999-up. Engines with the 1984-'99 style rear motor mount can be installed in any 1984-'99 style frame, providing the frame will accommodate the taller heads and Pro Stock style exhaust location. S&S TCSA crankcases. 1984-'99 or 1999-up style rear motor mount. S&S gear drive cams. S&S Pro Stock style flywheel assembly. 8.500" billet aluminum rods with 1.500" crankpin.
S&S cast Pro Stock cylinder heads w/electric compression releases.
Dual S&S Super D carburetors with air cleaner assemblies sold separately.
Turn key options, ignition system, driveline components, etc. available from Star Racing.
S&S STREET PRO ENGINE |
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Displacement |
Bore |
Stroke |
Chassis Capability |
Part No. |
MSRP |
120” (also Pro Mod) |
4.600” |
3.600” |
1999-’06 Big Twin |
31-9355 |
Call |
120” (also Pro Mod) |
4.600” |
3.600” |
1954-’99 Big Twin |
31-9357 |
Call |
133” |
4.600” |
4.000” |
1999-’06 Big Twin |
31-9317 |
Call |
133” |
4.600” |
4.000” |
1984-’99 Big Twin |
31-9419 |
Call |
139” |
4.600” |
4.187” |
1993-’06 Big Twin |
31-9356 |
Call |
139” |
4.800” |
3.850” |
1999-’06 Big Twin |
31-9421 |
Call |
139” |
4.800” |
3.850” |
1984-’99 Big Twin |
31-9420 |
Call |
Street Pro Customer Bikes
High Performance Motorcycle Parts (home)
1-800-841-7827 info@starracing.com
Harley Davidson® used for reference only