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JE Pistons Big Block Open Chamber Dome Top Pistons 258266S
Part Number: JEP-258266-1
JE Pistons Big Block Open Chamber Dome Top Pistons
Piston, Forged, Dome, 2-Valve Reliefs, 4.310 in. Bore, 4.250 in. Stroke, 6.135 in. Rod, 1.520 in. Compression, Chevy, Each
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Estimated Ship Date: Oct 19, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
258266S
Part Type:
Product Line:
Summit Racing Part Number:
JEP-258266-1
UPC:
193564196286
Piston Rings Included:
No
Bore (in.):
4.310 in.
Bore (mm):
109.474mm
Stroke:
4.250 in.
Engine Stroke Type:
Stroked
Rod Length:
6.135 in.
Piston Style:
Dome, with two valve reliefs
Piston Material:
Forged aluminum
Compression Height (in.):
1.520 in.
Piston Head Volume (cc):
-43.00cc
Wrist Pin Style:
Press-fit or floating
Wrist Pin Retainers Included:
No
Wrist Pin Included:
Yes
Pin Diameter (in.):
0.990 in.
Piston Ring Thickness:
1/16 in. x 1/16 in. x 3/16 in.
File Fit:
No
Gapless:
No
Remanufactured:
No
Quantity:
Sold individually.
JE Pistons Big Block Open Chamber Dome Top Pistons
JE Pistons big block open chamber dome top pistons are an excellent choice for drag race applications. Their compression height is figured using a 9.780 in. block height with zero deck clearance. The pistons include a pin, double Spiro locks, and double pin oilers. Their precision CNC-machined ring grooves will accept 1/16, 1/16, 3/16 rings.
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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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