![Load image into Gallery viewer, K2-6000-4155-455-Big Block Oldsmobile FXK2 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.155 inch bore](http://dssracing.com/cdn/shop/files/OLDSFX-TFTHR_3eb2a5c1-f16e-4a7a-94fd-c603dfebde36_400x@2x.jpg?v=1709318087)
![Load image into Gallery viewer, K2-6000-4155-455-Big Block Oldsmobile FXK2 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.155 inch bore](http://dssracing.com/cdn/shop/files/FX2_8598d5fe-ce77-4a58-863a-5617cff6593b_400x@2x.jpg?v=1709318087)
![Load image into Gallery viewer, K2-6000-4155-455-Big Block Oldsmobile FXK2 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.155 inch bore](http://dssracing.com/cdn/shop/files/pistonbox_785b1786-dbbd-492c-8b64-bb0874127651_400x@2x.jpg?v=1709318087)
![Load image into Gallery viewer, K2-6000-4155-455-Big Block Oldsmobile FXK2 Series -12cc Flat Top Oldsmobile-Forged-Piston-Set- 4.155 inch bore](http://dssracing.com/cdn/shop/files/FXKKitBlack_fmtcopy_6827357d-700a-4608-a896-d299fadbe12c_400x@2x.png?v=1709318088)
Engine Brand: Oldsmobile
Engine Family: Big Block Oldsmobile
Engine Size: 455
With/Without Rings: Includes Rings
Cylinder Bore Size: 4.155 in - 105.45 mm
Ring Width: 1/16-1/16-3/16"
Compression Height: 1.750
Pin Diameter: .980
Connecting Rod Length: 6.735 in
Crankshaft Stroke: 4.250 in
Piston Series: 2 - FX Series
Alloy: Forged 2618
Cylinder Head: Oldsmobile
TDC Assembly Height: 10.61
Piston Top Aprox. Comp. Ratio:
Chamber | Comp Ratio |
---|---|
72cc | 11.17 to 1 |
75cc | 10.85 to 1 |
77cc | 10.65 to 1 |
Engine Brand: Oldsmobile
Engine Family: Big Block Oldsmobile
Engine Size: 455
With/Without Rings: Includes Rings
Cylinder Bore Size: 4.155 in - 105.45 mm
Ring Width: 1/16-1/16-3/16"
Compression Height: 1.750
Pin Diameter: .980
Connecting Rod Length: 6.735 in
Crankshaft Stroke: 4.250 in
Piston Series: 2 - FX Series
Alloy: Forged 2618
Cylinder Head: Oldsmobile
TDC Assembly Height: 10.61
Piston Top Aprox. Comp. Ratio:
Chamber | Comp Ratio |
---|---|
72cc | 11.17 to 1 |
75cc | 10.85 to 1 |
77cc | 10.65 to 1 |
The DSS FX, X-Groove Feature
![](http://dssracing.com/cdn/shop/files/Screen_Shot_2023-02-02_at_12.58.44_PM_1780x_e2888a05-9892-4c89-88c1-e71433dd4633_750x.gif?v=1680360352)