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JE Pistons FSR Superfly GP Pistons
Piston, Forged, Flat Top, 2-Valve Reliefs, 4.030 in. Bore, 3.500 in. Stroke, 5.700 in. Rod, 1.550 in. Compression, Chevy, Left, Each
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Estimated Ship Date: Nov 13, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
300252L
Part Type:
Product Line:
Summit Racing Part Number:
JEP-300252L
Item Number:
5251053
UPC:
193564187154
Piston Rings Included:
No
Bore (in.):
4.030 in.
Bore (mm):
102.362mm
Stroke:
3.500 in.
Engine Stroke Type:
Stock
Actual Engine Displacement:
5.9L/357
Rod Length:
5.700 in.
Piston Style:
Flat top, with two valve reliefs
Piston Material:
Forged aluminum
Compression Height (in.):
1.550 in.
Piston Head Volume (cc):
+1.80cc
Wrist Pin Style:
Press-fit or floating
Wrist Pin Retainers Included:
Yes
Wrist Pin Included:
Yes
Pin Diameter (in.):
0.927 in.
Piston Ring Thickness:
0.043 in. x 0.043 in. x 3.00mm
File Fit:
No
Gapless:
No
Top Ring Thickness:
0.043 in.
Second Ring Thickness:
0.043 in.
Oil Ring Thickness:
3.0mm
Remanufactured:
No
Quantity:
Sold individually.
Notes:
Designed to fit left exhaust valve orientation. Also works with 3.480 in. stroke engines.
JE Pistons FSR Superfly GP Pistons
JE Pistons FSR Superfly GP pistons are the ultimate lightweight pistons for late model stock 2-barrel and similar applications up to 400 hp. FSR forging provides reduced skirt contact that lowers friction for optimum horsepower gains. These pistons feature a .190 in. deep intake valve pocket for maximum compression. The ring grooves are machined for 1.2, 1.2, 3.0mm backcut rings with lateral gas ports for superior ring seal.
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Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
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