Pistons, Rings, Wrist Pins, Bushings & More

Piston Rings, Pro GPX Gas Ported, 4.600 in. Bore, File Fit, Gas Nitrided, 0.043 in., 0.043 in., 3/16 in. Thickness, V8, Set

Part Number: SUM-GP4600446

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Pro GPX 81mm/3.189 Gas Ported Rings, Forged Honda B series pistons, File Fit, Gas Nitrided, 1.0mm, 1.2mm, 2.8mm Thickness, Single Piston Set

Part Number: SUM-GP8100XX

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Piston Rings, Pro GPX Gas Ported, 4.605 in. Bore, File Fit, Gas Nitrided, 0.043 in., 0.043 in., 3.0mm Thickness, V8, Set

Part Number: SUM-GP460543

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Pro GPX 85.5mm/3.366 Gas Ported Rings, Forged Honda B series pistons, File Fit, Gas Nitrided, 1.0mm, 1.2mm, 2.8mm Thickness, Single Piston Set

Part Number: SUM-GP8550XX

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Piston Rings, Pro GPX Gas Ported, 3.905 in. Bore, File Fit, Gas Nitrided, 1/16 in., 1/16 in., 3/16 in. Thickness, V8, Set

Part Number: SUM-GP390516

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Piston Rings, Pro GPX Gas Ported, 4.040 in. Bore, File Fit, Gas Nitrided, 1.0mm, 1.0mm, 2.0mm Thickness, V8, Set

Part Number: SUM-GP404010

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Piston Rings, Pro GPX Gas Ported, 4.060 in. Bore, File Fit, Gas Nitrided, 1.2mm, 1.2mm, 3.0mm Thickness, V8, Set

Part Number: SUM-GP406012

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Pro GPX 92mm/3.622 Gas Ported Rings, Aftermarket forged pistons, File Fit, Gas Nitrided, 1.0mm, 1.2mm, 2.8mm Thickness, Single Piston Set

Part Number: SUM-GP9200XX

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Piston Rings, Pro GPX Gas Ported, 4.420 in. Bore, File Fit, Gas Nitrided, 1/16 in., 1/16 in., 3/16 in. Thickness, V8, Set

Part Number: SUM-GP442016

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Piston Rings, Pro GPX Gas Ported, 4.625 in. Bore, File Fit, Gas Nitrided, 0.043 in., 1/16 in., 3/16 in. Thickness, V8, Set

Part Number: SUM-GP462546

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Wrist Pin Retainer, Wire Locks, 0.591 in. Diameter, 0.039 in. Thick, Steel, Pair

Part Number: WIS-CW15

5.0 out of 5 stars ( 1 )

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Piston Rings, Pro GPX Gas Ported, 4.200 in. Bore, File Fit, Gas Nitrided, 1/16 in., 1/16 in., 3/16 in. Thickness, V8, Set

Part Number: SUM-GP420016

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Piston Rings, Pro GPX Gas Ported, 4.630 in. Bore, File Fit, Gas Nitrided, 1/16 in., 1/16 in., 3/16 in. Thickness, V8, Set

Part Number: SUM-GP463016

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Pro GPX 99.5mm/3.917 Gas Ported Rings, Aftermarket forged pistons, File Fit, Gas Nitrided, 1.0mm, 1.2mm, 2.8mm Thickness, Single Piston Set

Part Number: SUM-GP9950XX

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Piston Rings, Pro GPX Gas Ported, 4.165 in. Bore, File Fit, Plasma-moly, 5/64 in., 5/64 in., 3/16 in. Thickness, V8, Set

Part Number: SUM-GP416564

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Estimated Ship Date: Apr 20, 2026 if ordered today

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Pro GPX 87mm/3.425 Gas Ported Rings, Forged Sport Compact pistons, File Fit, Gas Nitrided, 1.0mm, 1.2mm, 2.8mm Thickness, Single Piston Set, V8, Set

Part Number: SUM-GP8700XX

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Wrist Pin Retainer, Wire Locks, 0.866 in. Diameter, 0.049 in. Thick, Steel, Pair

Part Number: WIS-CW22

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Piston Rings, Pro GPX Gas Ported, 4.065 in. Bore, File Fit, Gas Nitrided, 1.5mm, 1.5mm, 2.5mm Thickness, V8, Set

Part Number: SUM-GP406525

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Piston Rings, Pro GPX Gas Ported, 4.070 in. Bore, File Fit, Gas Nitrided, 1/16 in., 1/16 in., 3/16 in. Thickness, V8, Set

Part Number: SUM-GP407016

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Pro GPX 82mm/3.228 Gas Ported Rings, Forged Honda B series pistons, Gas Nitrided Steel top 1.0mm, 1.2mm, 2.8mm Thickness, Single Piston Sett

Part Number: SUM-GP8200XX

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Piston Wrist Pin Retainers, Piston Retaining Clips, Wire Lock Type, Steel, Bombardier, Can-Am, KTM, Polaris, Pair

Part Number: WIS-W5509

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Estimated Ship Date: Mar 25, 2026 if ordered today

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Pro GPX 87.5mm/3.445 Gas Ported Rings, Forged Sport Compact pistons, File Fit, Gas Nitrided, 1.0mm, 1.2mm, 2.8mm Thickness, Single Piston Set,

Part Number: SUM-GP8750XX

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Pro GPX 89mm/3.504 Gas Ported Rings, Forged Sport Compact pistons,File Fit, Gas Nitrided, 1.0mm, 1.2mm, 2.8mm Thickness, Single Piston Set,

Part Number: SUM-GP8900XX

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Piston Wrist Pin Retainers, Retaining Clips, Wire Lock Type, Steel, 0.063 in. Thickness, 0.827 in. Wrist Pin Diameter, Kawasaki, Polaris, Yamaha, Pair

Part Number: WIS-CW28

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 25, 2026 if ordered today

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Pro GPX 96mm/3.780 Gas Ported Rings, Aftermarket forged pistons, File Fit, Gas Nitrided, 1.0mm, 1.2mm, 2.8mm Thickness, Single Piston Set

Part Number: SUM-GP9600XX

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