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DIAMOND Racing STREET/STRIP DOME Pistons [Bore 3.800 | Stroke 3.622 | Rod 6.125 | C.D. 1.304 | Weight XXX | Pin .927 x 2.500 | CC\'s -9.5 | 57cc 9.7 | 60cc 9.4] (GM 5.3L EcoTec3 L83)

DIAMOND Racing STREET/STRIP DOME Pistons [Bore 3.800 | Stroke 3.622 | Rod 6.125 | C.D. 1.304 | Weight XXX | Pin .927 x 2.500 | CC's -9.5 | 57cc 9.7 | 60cc 9.4] (GM 5.3L EcoTec3 L83)

$917.97  $872.07
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  • 3D milling on piston crowns for ready to install finish
  • Valve pockets designed to work with most aftermarket cylinder heads
  • Offset pins for quiet operation
  • Moly skirt coating for friction loss and skirt wear protection
  • Side gas ports for better ring seal
  • Top ring down dimension: .250"
  • Ratios figured for .053 head gasket
  • Premium 1.0mm x 1.2mm x 2.8mm ring package included
  • Premium 8620 .185W wrist pins included
  • Valve pocket depth: 0.130" intake and .150" exhaust
  • 2618 material for High HP-NOS-Boost applications
Optional H-13, M2 and TP-1 wrist pins available as a upgrade to any piston part number.


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  • Model: 21507-R1-8
  • FROM: DIAMOND Pistons

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we added this on Friday 10 November, 2023.

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