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Diamond Pistons

Diamond Pistons Race Series 21531-RS-8 Pistons, Flat Top, 12 Degree LS2K Series, Forged Aluminum, 4.125 in. Bore, -4.80cc Head Volume, Chevy, LSX, Set of 8

SKU: DPP21531-RS-8

Pistons
Diamond Pistons Race Series 21531-RS-8 Pistons, Flat Top, 12 Degree LS2K Series, Forged Aluminum, 4.125 in. Bore, -4.80cc Head Volume, Chevy, LSX, Set of 8

Diamond Pistons

Diamond Pistons Race Series 21531-RS-8 Pistons, Flat Top, 12 Degree LS2K Series, Forged Aluminum, 4.125 in. Bore, -4.80cc Head Volume, Chevy, LSX, Set of 8

SKU: DPP21531-RS-8

Pistons
A$3,341.93
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.
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Description

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

Part Type

Pistons

Data: v4.2 - Upd: 2026-10-14 08:49:30

Specifications

Product Attributes - Brand
Diamond Pistons
Product Attributes - Manufacturer's Part Number
21531-RS-8
Product Attributes - Part Type
Pistons
Product Attributes - Product Line
Diamond Pistons Race Series Pistons
Product Attributes - UPC
686162209057
Product Attributes - Piston Rings Included
Yes
Product Attributes - Bore (in.)
4.125 in.
Product Attributes - Bore (mm)
104.775mm
Product Attributes - Stroke
4.000 in.
Product Attributes - Engine Stroke Type
Stroked
Product Attributes - Rod Length
6.125 in.
Product Attributes - Piston Style
Flat top, with two valve reliefs
Product Attributes - Piston Material
Forged aluminum
Product Attributes - Compression Height (in.)
1.115 in.
Product Attributes - Piston Head Volume (cc)
+4.80cc
Product Attributes - Wrist Pin Style
Press-fit or floating
Product Attributes - Wrist Pin Retainers Included
Yes
Product Attributes - Wrist Pin Included
Yes
Product Attributes - Pin Diameter (in.)
0.927 in.
Product Attributes - Piston Ring Thickness
1.50mm x 1.50mm x 3.00mm
Product Attributes - File Fit
Yes
Product Attributes - Gapless
No
Product Attributes - Top Ring Thickness
1.5mm
Product Attributes - Top Ring Material
Stainless steel
Product Attributes - Top Ring Facing Material
C-23 PVD Chrome
Product Attributes - Second Ring Thickness
1.5mm
Product Attributes - Second Ring Material
Cast iron
Product Attributes - Second Ring Facing Material
Cast iron
Product Attributes - Oil Ring Thickness
3.0mm
Product Attributes - Oil Ring Material
Carbon steel
Product Attributes - Oil Ring Tension
Standard
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold as a set of 8.
Product Attributes - Notes
For use on LSX race engines only.

Reference Information

Brand Name/s Diamond Pistons
StreetFX SKU dpp21531-RS-8
SFX Item ID 5525335
Supplier Item Code 5525335
Manufacturer SKU 21531-RS-8
Manufacturer UPC 686162209057
Alternative References LS2K, -4.80cc

Compatibility

Application Data
  • MakeCHEVROLET
    Beginning Year1997
    Ending Year2004
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.7L/350
    Application NotesFor use on LSX race engines only.
  • MakeCHEVROLET
    Beginning Year1999
    Ending Year2007
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size4.8L/294
    Application NotesFor use on LSX race engines only.
  • MakeCHEVROLET
    Beginning Year1999
    Ending Year2007
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Application NotesFor use on LSX race engines only.
  • MakeCHEVROLET
    Beginning Year1999
    Ending Year2007
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.0L/364
    Application NotesFor use on LSX race engines only.
  • MakeCHEVROLET
    Beginning Year2005
    Ending Year2014
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size5.3L/325
    Application NotesFor use on LSX race engines only.
  • MakeCHEVROLET
    Beginning Year2005
    Ending Year2017
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size4.8L/294
    Application NotesFor use on LSX race engines only.
  • MakeCHEVROLET
    Beginning Year2005
    Ending Year2020
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.0L/364
    Application NotesFor use on LSX race engines only.
  • MakeCHEVROLET
    Beginning Year2008
    Ending Year2017
    Engine TypeV8
    Engine FamilyChevy small block Gen III/IV (LS-based engines)
    Engine Size6.2L/376
    Application NotesFor use on LSX race engines only.

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