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Diamond Pistons Race Series Pistons
LS2K - 2000HP Rated - 2618 Material - Inboard Design - Coated Skirts - Includes H13 Pins and AP Rings
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Estimated Ship Date: Oct 21, 2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
21527-RS-8
Part Type:
Product Line:
Summit Racing Part Number:
DPP-21527-RS-8
UPC:
686162209019
Piston Rings Included:
Yes
Bore (in.):
4.035 in.
Bore (mm):
102.489mm
Stroke:
4.000 in.
Engine Stroke Type:
Stock/Stroked
Rod Length:
6.125 in.
Piston Style:
Flat top, with two valve reliefs
Piston Material:
Forged aluminum
Compression Height (in.):
1.115 in.
Piston Head Volume (cc):
+4.80cc
Wrist Pin Style:
Floating
Wrist Pin Retainers Included:
Yes
Wrist Pin Included:
Yes
Pin Diameter (in.):
0.927 in.
Piston Ring Thickness:
1.50mm x 1.50mm x 3.00mm
File Fit:
Yes
Gapless:
No
Top Ring Thickness:
1.5mm
Top Ring Material:
Stainless steel
Top Ring Facing Material:
C-23 PVD Chrome
Second Ring Thickness:
1.5mm
Second Ring Material:
Ductile iron
Second Ring Facing Material:
Ductile iron
Oil Ring Thickness:
3.0mm
Oil Ring Material:
Stainless steel
Oil Ring Tension:
Standard
Remanufactured:
No
Quantity:
Sold as a set of 8.
Notes:
Pistons are 2618 material.
Diamond Pistons Race Series Pistons
Diamond Pistons Race Series pistons will withstand some serious horsepower for your high performance engine. These 2618 aluminum pistons are not only significantly lighter than the factory pistons but also superior in strength. The 2618 alloy is specifically for high-horsepower, nitrous, and boosted engines making up to 2,000 hp.
Diamond Pistons Race Series pistons feature:
* 3D milling on piston crowns for "ready to install" finish
* Inside design forging with fully machined underskirts for maximum strength
* Valve pockets designed to work with most aftermarket cylinder heads
* Side gas ports for better ring seal
* Moly skirt coating for friction-loss and skirt-wear protection
* Premium H-13 wrist pins included; chamfered for round wire locks
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Some parts are not legal for use in California or other states with similar laws / regulations
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