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JE Pistons FSR Tour Series GP Pistons
Piston, Forged, Flat Top, 2-Valve Reliefs, 4.040 in. Bore, 3.500 in. Stroke, 6.000 in. Rod, 1.250 in. Compression, Chevy, Right, Each
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Estimated Ship Date: Nov 11, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
258030R
Part Type:
Product Line:
Summit Racing Part Number:
JEP-258030R
Item Number:
5250944
UPC:
193564211910
Piston Rings Included:
No
Bore (in.):
4.040 in.
Bore (mm):
102.616mm
Stroke:
3.500 in.
Engine Stroke Type:
Stock
Actual Engine Displacement:
5.9L/359
Rod Length:
6.000 in.
Piston Style:
Flat top, with two valve reliefs
Piston Material:
Forged aluminum
Compression Height (in.):
1.250 in.
Piston Head Volume (cc):
+5.00cc
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 right exhaust valve orientation with 20/30 valve spacing. Also works with 3.480 in. stroke engines.
JE Pistons FSR Tour Series GP Pistons
JE Pistons FSR tour series GP pistons are a lightweight design specifically made for naturally aspirated Circle Track or drag race applications up to 650 hp. Their ring package has been raised for maximum efficiency. These pistons are an aggressive, competition-only design, not intended for street or nitrous use. Their ring grooves are precision-machined for .043, .043, 3.0mm rings and their valve reliefs will accommodate angle-milled aftermarket cylinder heads.
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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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