Home > Parts > Racing Parts - Honda GX and Chinese OHV > Pistons, Rings, & Wristpins > Racing Pistons > GX390, 420s, & 460s.
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88mm (GX390) Cast Flat-Tops 88mm (GX390) Forged Pistons 90mm (420cc) Pistons
92mm (460cc) Pistons Stroker Pistons Closeouts & Specials
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Piston, 90mm Dished for 420cc OHV Predator Piston, 90mm Dished for 420cc OHV Predator

90mm Aftermarket Dished Piston for 420cc Predators. Fits Most 390 Style Engines.

Our Price: $15.70
Piston, 92mm Dished for 440 & 460cc Predator, New Take-Off Piston, 92mm Dished for 440 & 460cc Predator, New Take-Off

92mm Aftermarket Dished Piston for 440 & 460cc OHV GX390 Style Engines

Our Price: $16.22
Piston, 90mm Flat-Top for 420 OHV & GX390 Type Engines Piston, 90mm Flat-Top for 420 OHV & GX390 Type Engines

90mm Aftermarket Flat-Top Piston for Big Bore GX390s. Fits Stock Bore on 420 Predators (Non-Hemi).

Our Price: $24.75
Piston, 90mm Flat-Top for 420cc Hemi Predator Piston, 90mm Flat-Top for 420cc Hemi Predator

90mm Aftermarket Flat-Top Piston for 420cc Predators and GX390s with 90mm Bore

Our Price: $24.75
Piston, GX390, Flat-Top: Aftermarket, T3 Style (Thin Ring) Piston, GX390, Flat-Top: Aftermarket, T3 Style (Thin Ring)

88mm Aftermarket Flat-top Piston for stock bore GX390s.

Our Price: $27.50
Piston, 92mm for 460 & GX390 Type Engines, Cast Flat-Top Piston, 92mm for 460 & GX390 Type Engines, Cast Flat-Top

92mm Diameter Cast Piston. Up to 460c When Used with 69mm Stroker Cranks.

Our Price: $32.35
Piston, GX390, Flat-Top: Aftermarket, T2 Style (Thick Ring) Piston, GX390, Flat-Top: Aftermarket, T2 Style (Thick Ring)

88mm Aftermarket Flat-Top Piston for Bore GX390

Our Price: $51.88
Piston, 90mm Flat-Top, Aftermarket, Cut -.060" Piston, 90mm Flat-Top, Aftermarket, Cut -.060"

90mm Aftermarket Flat-Top Piston for Bored GX390s Only. Cut -.060 for Use with 4.510" Rod.

Our Price: $54.36
Piston, GX390, Flat-Top: Aftermarket, Cut -.060 for 4.510 Rod Piston, GX390, Flat-Top: Aftermarket, Cut -.060 for 4.510 Rod

88mm Aftermarket Flat-Top Piston for Bored GX390s Only. Cut -.060 for Use with 4.510" Rod.

Our Price: $57.11
Piston, GX390, Forged Flat-Top, Stroker Applications Piston, GX390, Forged Flat-Top, Stroker Applications

Forged Flat-Top Piston for GX390s and UT2 GX340s Using ARC's +.200 Stroker Crank

Our Price: $157.00
Piston, 92mm for 460 & GX390 Type Engines, Forged, Flat-Top Piston, 92mm for 460 & GX390 Type Engines, Forged, Flat-Top

Lightweight flat-top forged piston for 92mm bore clone engine (440 & 460). This piston along with a billet rod will complete your bullet-proof engine build.

Our Price: $174.00
Piston, GX390, Forged Flat-Top, Drop-in Design, Standard Piston, GX390, Forged Flat-Top, Drop-in Design, Standard

Forged Flat-Top Piston to Fit GX390 and UT2 GX340. Stock Bore with Factory Compression Height and Stock Wrist Pin Diameter. Drop-In with Standard Length Rod.

Our Price: $175.00
Piston, 420cc OHV & Predator (90mm), Forged Flat-Top Piston, 420cc OHV & Predator (90mm), Forged Flat-Top

90mm Forged Flat-Top to Fit 420cc OHVs, 420 Predators, and +.080 over GX390s. Pistons Have Valve Reliefs for High Lift Cams to Fit Both Honda & Hemi Heads.

Our Price: $178.00
Piston, 420cc OHV & Predator (90mm), Forged Flat-Top, Stroker Applications Piston, 420cc OHV & Predator (90mm), Forged Flat-Top, Stroker Applications

90mm Forged Flat-Top Piston for 420cc OHV, 420 Predator, & +.080 Over GX390. Has .050 Shorter Compression Height to Fit ARC Stroker Cranks.

Our Price: $182.00