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Piston, 90mm Flat-Top for 420 OHV & GX390 Type Engines
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Piston, 90mm Flat-Top for 420 OHV & GX390 Type Engines
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Our Price: $24.99

Stock Status:In Stock

Part #: 420PISTONKIT
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Description -
 
90mm Aftermarket Flat-Top Piston for Big Bore GX390s
Fits stock bore on 420 Predators (non-hemi).
GX390 blocks can be bored to accept this piston.
Includes piston and rings (pin and clips not included).

  • 407cc with Stock Crank
  • 433 with +.160 Stroker Crank
  • 440cc with .200 Crank
*Picture is for reference only. Actual part may be slightly different.

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