International orders NOT eligible for free shipping.


0 item(s) - $0.00
You have no items in your shopping cart.


More Views

DIAMOND PISTON - 4.065 - 4.000 - 6.125 - Flat Top -3.0cc - 21515-RS-8

Availability: In stock Will Ship Directly From Manufacturer



DIAMOND PISTON - 4.065 - 4.000 - 6.125 - Flat Top -3.0cc - 21515-RS-8
Diamond LS2K 15 degree forged flat top pistons are rated to support 2000 horsepower. Diamond LS2K Pistons feature 3D milling on the piston crowns for ready to install finish. Piston feature inboard forging design with fully machined under crown for maximum strength. Valve pockets are designed to work with most all LS 15 degree cylinder heads. Side gas ports are added for better ring seal along with Moly skirt coating for friction loss and skirt wear protection. Top ring is down .280 on (1.115cd) and .250 on (1.053cd) pistons. Premium steel 1.5mm top ring, 1.5mm napier second, with standard tension 3.0mm ring package included. Premium H-13 .225 wall wrist pins included and chamfered for round wire locks included. Valve pocket depth .200 Intake, and .145 on the Exhaust. Compression ratios are figured using .053 head gasket. Diamond LS2K Pistons are 2618 material and are designed for HP-NOS-Boost applications, Rated for 2000 HP 

Compression Ratio:
  • 64cc 11.6:1
  • 69cc 11.0:1
  • 72cc 10.7:1

Additional Information

Length 28
Height 8
Width 12
Weight 9.0000
BTR SKU 21515-RS-8
Brand Diamond Pistons
Part Type Pistons
Piston Volume -3cc
Your One Stop Shop LS Performance. Camshafts, Valve Springs, and More! LS1 LS2 LS3 LS7 LS9 LSA and More! BTR Cams and BTR Valve Springs Come in FIRST! Gen V LT Performance Superstore Copyright © 2018 All Rights Reserved.