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DIAMOND PISTONS

Diamond LS2K 4.125 Bore 4.000 Stroke -20cc Dish Piston Kit 21557-RS-8

PART NUMBER:
21557-RS-8
MPN:
21557-RS-8
Availability:
Ships from Manufacturer
Shipping:
Free over $50 in U.S. 48
Type:
Dish Pistons
Bore (in.):
4.125
Stroke (in.):
4.000
Rod Length (in.):
6.125
Compression Height (in.):
1.115
Crown Volume (cc):
-20
Compression Ratio w/70cc:
9.5:1
Wrist Pins Included:
Yes
Wrist Pin Material:
H-13
Pin Diameter (in.):
0.927
Pin Length (in.):
2.250
Alloy:
2618
Rings Included:
Yes
Ring Sizes:
1.5mm, 1.5mm, 3.0mm
Weight (g):
477
Int Valve Pocket Depth (in.):
0.220
Exh Valve Pocket Depth (in.):
0.162
Moly Coated Skirt:
Yes
For Use w/ Power Adder:
Yes
Quantity:
Sold as set of 8
$1,226.43

Description

Diamond LS2K 4.125 Bore 4.000 Stroke -20cc Dish Piston Kit 21557-RS-8

Features:

  • 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: 0.200" intake and .145" exhaust

  • 2618 material for High HP-NOS-Boost applications - rated for 2000HP

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