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Part Number:
DRP-21017

21017 Diamond Pistons BB Chevy 20° Competition Forged Dome 4.605 Bore

Fits BB Chevy, Bore 4.605, Stroke 4.250, Rod Length 6.385, Dome 27.94cc, Set of 8 Pistons

$1,197.72
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⚠ PROP 65 WARNING
⚠ WARNING: This product can expose you to chemicals, which are known to the State of California to cause cancer. Please contact us to obtain a list of harmful chemicals. For more information, go to www.P65Warnings.ca.gov.
Diamond Pistons are some of the best aftermarket pistons on the market. Trust your new engine with a set of Diamond Pistons
  • Designed for use with Brodix SR20 and Dart 20 Degree cylinder heads
  • Vertical gas ports for maximum ring seal
  • Inboard forging design for maximum strength
  • Suitable for small to medium nitrous applications
  • Moly skirt coating included
  • Premium .043 x .043 x 3mm Total Seal AP ring package available
  • Premium Trend H-13.185" wall tool steel wrist pins included
  • Top Ring down = .280" - .295" on 1.065 C/D
  • Accommodates a maximum intake valve size of 2.400" and exhaust valve size of 1.800"
  • Valve relief depth= .345" intake and -.030" exhaust


    Compression Ratio with 95cc Heads 14.6:1
    Call for piston weight
  • More Information
    CNC Part Number DRP-21017
    Price $1,197.72
    Manufacturer's Part Number 21017
    Brands Diamond
    Part Types Engine Piston
    Departments Parts
    Vehicle Make Chevy BB
    Bore Size 4.605
    Crankshaft Stroke 4.250
    Rod Length 6.385
    Piston Type Dome
    Compression Height 1.270
    Piston Material 2618 Forged
    Piston Ring Size .043 .043 3.0mm
    Wrist Pin Size 0.990
    Custom Notices ⚠ PROP 65 WARNING
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