S&S is offering 4 3?8" bore large displacement engines to racers and custom bike builders. These engines have the same general specifications as the original Tribute 145 engines, but are now offered in a version for 1999–up chassis in two different strokes, 4 3/16" and 4 13?16". The TCSA 126" and 145" are available unassembled and in natural finish only. Fuel systems must be purchased separately. All S&S engines using TCSA crankcases are available exclusively through G Squared Motorsports.
- S&S 126" or 145" displacement engines
- 126" (4.375" bore x 4.187" stroke)
- 145" (4.375" bore x 4.813" stroke)
- TCSA cases for 1984–'99 or 1999-'06 chassis
- S&S oil pump for 1999–'06 big twins
- .640 gear drive cams—126"
- .675 gear drive cams—145"
- Pressed together crankshaft assembly
- Big Fin "B2" cylinder heads
- S&S Variable Fuel Injection or S&S Super D carburetor, G-Extreme (sold separately)
- Natural finish only
1999–'06 . . . . .31-8058
1984–'99 . . . .31-9758
