DIAMOND LSX 12° PISTONS - 4.125" - 4.000" STROKE -20cc DISH 21557-RS-8

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SKU: 21557-RS-8

Availability: In stock Will Ship Directly From Manufacturer




Diamond Chevrolet LSX 12°, 4.125 Bore, 4.000 Stroke, 6.125 Rod, 1.15 comp height, -20.0cc, .927 x 2.250 pin, 21557-RS-8


  • 3D milling on piston crowns for ready to install finish
  • Inboard forging design with fully machined under crown for maximum strength
  • Valve pockets designed to work with most aftermarket 12° cylinder heads
  • Side gas ports for better ring seal
  • Moly skirt coating for friction loss and skirt wear protection
  • Top ring down dimension: .280" (1.115cd) .250" (1.053cd)
  • Ratios figured for .053 head gasket
  • Premium 1.5mm x 1.5mm x 3.0mm ring package included
  • Premium H-13 .250W wrist pins included chamfered for round wire locks
  • Valve pocket depth: 0.220" intake and .162" exhaust
  • 2618 material for High HP-NOS-Boost applications - rated for 2000HP

Additional Info

Additional Info

Length 0.000000
Height 0.000000
Width 0.000000
Weight 18.0000
LJMS SKU 21557-RS-8
Brand Diamond Pistons
Part Type No
Bore Size No
Cam Style No
Chassis No
Engine Type No
Fitting Angle No
Fuel Pump Inlet N/A
Fuel Pump Outlet N/A
Adapter Size N/A
Gasket Material No
Intake Style N/A
Material No
Oil Weight No
Port Style No
Quantity No
Reluctor Type No
Size No
Stroke No
Oil Type No
Thickness No
Transmission No
Vehicle No
Vehicle Trim No
Piston Volume -20cc
Shipping Option No


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