![Load image into Gallery viewer, 1-2457-4165 420 Small Block Chevy 1-FX Series +4cc Dome Top Forged Piston Set. 4.165 bore](http://dssracing.com/cdn/shop/products/SBCFX-MHCHR_5074d94f-130b-433b-9973-c8acca4d67b7_400x@2x.jpg?v=1672086376)
![Load image into Gallery viewer, DISCONTINUED USE 1-2458-4165 420 Small Block Chevy 1-FX Series +4cc Dome Top Forged Piston Set. 4.165 bore](http://dssracing.com/cdn/shop/products/FX1_f31fb5be-45ee-426a-825f-7330d9ee3b7a_400x@2x.jpg?v=1678072588)
![Load image into Gallery viewer, DISCONTINUED USE 1-2458-4165 420 Small Block Chevy 1-FX Series +4cc Dome Top Forged Piston Set. 4.165 bore](http://dssracing.com/cdn/shop/products/pistonbox_23e8735d-99b4-4001-857a-92d1a8c69807_400x@2x.jpg?v=1678072588)
Engine Brand: Chevy
Engine Family: Small Block Chevy
Engine Size: 420
With/Without Rings: Without Rings
Cylinder Bore Size: 4.165 in - 105.71 mm
Ring Width: 1.2/1.2/3MM
Compression Height: 1.362"
Pin Diameter: .927
Connecting Rod Length: 5.700"
Crankshaft Stroke: 3.875"
Piston Series: 1-FX Series
Alloy: Forged 4032
Cylinder Head: SBC 23 Degree
TDC Assembly Height: 9.000
Piston Top Aprox. Comp. Ratio:
Chamber | Comp. Ratio |
---|---|
58cc | 14.74 to 1 |
64cc | 13.54 to 1 |
70cc | 12.54 to 1 |
Engine Brand: Chevy
Engine Family: Small Block Chevy
Engine Size: 420
With/Without Rings: Without Rings
Cylinder Bore Size: 4.165 in - 105.71 mm
Ring Width: 1.2/1.2/3MM
Compression Height: 1.362"
Pin Diameter: .927
Connecting Rod Length: 5.700"
Crankshaft Stroke: 3.875"
Piston Series: 1-FX Series
Alloy: Forged 4032
Cylinder Head: SBC 23 Degree
TDC Assembly Height: 9.000
Piston Top Aprox. Comp. Ratio:
Chamber | Comp. Ratio |
---|---|
58cc | 14.74 to 1 |
64cc | 13.54 to 1 |
70cc | 12.54 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)