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Diamond Pistons Sport Compact Series Pistons
Subaru EJ257 DS 3.9566B/1.129CD
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Estimated Ship Date: Dec 7, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
36026
Part Type:
Product Line:
Summit Racing Part Number:
DPP-36026
UPC:
193564403728
Piston Rings Included:
No
Bore (in.):
3.957 in.
Bore (mm):
105.000mm
Stroke:
83.00mm
Engine Stroke Type:
Stroked
Rod Length:
5.137 in.
Piston Style:
Dish, with four valve reliefs
Piston Material:
Forged aluminum
Compression Height (in.):
1.129 in.
Piston Head Volume (cc):
+26.00cc
Wrist Pin Style:
Floating
Wrist Pin Retainers Included:
No
Wrist Pin Included:
No
Pin Diameter (in.):
0.905 in.
Piston Ring Thickness:
1.20mm x 1.20mm x 2.00mm
File Fit:
No
Gapless:
No
Remanufactured:
No
Quantity:
Sold individually.
Notes:
Piston is 2618 material.
Diamond Pistons Sport Compact Series Pistons
Diamond Pistons Sport Compact Series pistons are ideal for either the street or the drag strip. These forged aluminum pistons are significantly stronger than the factory pistons allowing your engine to handle that extra horsepower.
Diamond Pistons Sport Compact Series pistons feature:
* 3D milling on piston crowns for "ready to install" finish
* Side gas ports for better ring seal
* Moly skirt coating for friction-loss and skirt-wear protection
* Oversized valve pockets for "larger than stock" valve sizes
* Forged 2618 or 4032 aluminum alloy (where specified)
* Premium 8620 or H-13 steel wrist pins (where specified)
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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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