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JE Pistons Big Duke/Big Chief GP 18-Degree Pistons 170671
Part Number: JEP-170671
JE Pistons Big Duke/Big Chief GP 18-Degree Pistons
Pistons, Forged, Dome, 2-Valve Reliefs, 4.530 in. Bore, 4.250 in. Stroke, 6.385 in. Rod, 1.270 in. Compression, Chevy, Set of 8
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Estimated Ship Date: Mar 25, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
170671
Part Type:
Product Line:
Summit Racing Part Number:
JEP-170671
UPC:
00193564217653
Piston Rings Included:
No
Bore (in.):
4.530 in.
Bore (mm):
115.062mm
Stroke:
4.250 in.
Rod Length:
6.385 in.
Piston Style:
Dome, with two valve reliefs
Piston Material:
Forged aluminum
Compression Height (in.):
1.270 in.
Piston Head Volume (cc):
-13.00cc
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:
0.043 in. x 1/16 in. x 3/16 in.
File Fit:
No
Gapless:
No
Remanufactured:
No
Quantity:
Sold individually.
Notes:
Oil rail support included.
JE Pistons Big Duke/Big Chief GP 18-Degree Pistons
JE Pistons Big Duke/Big Chief GP 18-degree pistons feature a race-proven dome and skirt design and are specifically designed for the Big Duke/Big Chief cylinder heads. The valve reliefs have been designed to accept oversized valves and long-duration, tight lobe separation roller cams. Their ring grooves are precision CNC-machined and the pistons are offered in nitrous versions, too.
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Some parts are not legal for use in California or other states with similar laws / regulations
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