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JE Pistons Subaru EJ Series Pistons
Piston, Forged, Dish, 4-Valve Reliefs, 3.937 in. Bore, 3.110 in. Stroke, 5.138 in. Rod, 1.209 in. Compression, Subaru, Right, Each
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Overview
Brand:
Manufacturer's Part Number:
310938R
Part Type:
Product Line:
Summit Racing Part Number:
JEP-310938R
UPC:
193564019622
Piston Rings Included:
Yes
Bore (in.):
3.937 in.
Bore (mm):
100.000mm
Stroke:
79.00mm
Engine Stroke Type:
Stock
Actual Engine Displacement:
2.5L/2482cc
Rod Length:
130.500mm
Piston Style:
Dish, with four valve reliefs
Piston Material:
Forged aluminum
Compression Height (in.):
1.209 in.
Piston Head Volume (cc):
+7.60cc
Wrist Pin Style:
Press-fit or floating
Wrist Pin Retainers Included:
Yes
Wrist Pin Included:
Yes
Pin Diameter (in.):
0.905 in.
Piston Ring Thickness:
0.048 in. x 0.048 in. x 0.100 in.
File Fit:
Yes
Gapless:
No
Top Ring Thickness:
0.047 in.
Top Ring Material:
Carbon steel
Top Ring Facing Material:
Gas nitrided
Second Ring Thickness:
0.047 in.
Second Ring Material:
Iron
Second Ring Facing Material:
Phosphate coated
Oil Ring Thickness:
0.098 in.
Oil Ring Material:
Carbon steel
Oil Ring Tension:
Low
Remanufactured:
No
Quantity:
Sold individually.
Notes:
Fits right side exhaust valve orientation, will work with turbocharger or nitrous oxide.
JE Pistons Subaru EJ Series Pistons
JE Pistons has applied over 75 years of experience to its wide range of premium forged pistons for European, import, and sport compact applications, and they have been performance-proven in victory lane time and time again.
JE Pistons Subaru EJ Series pistons are single replacements. Available in different bore sizes for right or left, the pistons are specifically engineered for extreme applications up to, and including, professional competition. In such environments, the higher compression ratios and boost necessitate the high-tensile strength of forged 2618 aluminum construction. The skirts feature a proprietary Forged Side Relief (FSR) forging design that minimizes friction and power loss with reduced skirt width and saves additional weight with a shorter wrist pin. High-quality wrist pins, locks, and piston rings are included. Equip your engine with the best in forged pistons—JE Pistons.
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