Piston Rings

Piston Rings, Gas Nitrided Steel Top, Martensitic Ductile Napier Second, Std. Tension Oil, File Fit for 4.040 in. Bore, 1.2mm, 1.2mm, 3.0mm, Set

Part Number: SUM-136SN9045045

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Piston Rings, 4.040 in. Bore, Cast Iron, 1.0mm., 1.0mm, 2.0mm Thickness, 8-Cylinder, Set

Part Number: MLE-4045MS-112

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Piston Rings, Performance Series, 4.040 in. Bore, File Fit, 1/16 in., 1/16 in., 3/16 in., 8-Cylinder, Set

Part Number: MLE-4045MS

5.0 out of 5 stars ( 1 )

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Piston Rings, Performance Series, 4.040 in. Bore, File Fit, 1.5mm, 1.5mm, 3.0mm, 8-Cylinder, Set

Part Number: MLE-4045MS-15

5.0 out of 5 stars ( 1 )

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Piston Rings, Pro GPX Gas Ported, 4.040 in. Bore, File Fit, Plasma-moly, 5/64 in., 5/64 in., 3/16 in. Thickness, V8, Set

Part Number: SUM-GP404064

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Piston Rings, Plasma-moly, 4.040 in. Bore, 1/16 in. 1/16 in., 3/16 in. Thickness, 8-Cylinder, Set

Part Number: JEP-S100S8-40405

5.0 out of 5 stars ( 1 )

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Piston Rings, Performance Series, 4.040 in. Bore, File Fit, 0.043 in., 0.043 in., 3.0mm, 8-Cylinder, Set

Part Number: MLE-4045ML-043

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Piston Rings, Plasma-moly, 4.040 in. Bore, 5/64 in., 5/64 in., 3/16 in. Thickness, 8-Cylinder, Set

Part Number: TSR-CRL9090-45

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Piston Rings, Plasma-moly, 4.040 in. Bore, File Fit, 5/64 in., 5/64 in., 3/16 in., 8-Cylinder, Set

Part Number: SLP-R-9343-45

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Piston Rings, 4.040 in. Bore, 1/16 in., 1/16 in., 3/16 in., Ductile, Plasma-moly, File Fit, 8-Cylinder, Set

Part Number: UEM-4000BD8-045

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Piston Rings, Pro GPX Gas Ported, 4.040 in. Bore, File Fit, Gas Nitrided, 1.5mm, 1.5mm, 3.0mm Thickness, V8, Set

Part Number: SUM-GP404015

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Piston Rings, Plasma-moly, 4.040 in. Bore, 1/16 in, 1/16 in. 3/16 in. Thickness, 8-Cylinder, Set

Part Number: JEP-J100F840405

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Estimated Ship Date: Mar 20, 2026 if ordered today

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Piston Rings, Plasma-moly, 4.040 in. Bore, 1/16 in., 1/16 in., 3/16 in. Thickness, 8-Cylinder, Set

Part Number: TSR-CRL3690-45

2.0 out of 5 stars ( 1 )

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Piston Rings, Pro GPX Gas Ported, 4.040 in. Bore, File Fit, Gas Nitrided, 1.2mm, 1.2mm, 3.0mm Thickness, V8, Set

Part Number: SUM-GP404012

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Piston Rings, Pro GPX Gas Ported, 4.040 in. Bore, File Fit, Gas Nitrided, 0.043 in., 0.043 in., 3.0mm Thickness, V8, Set

Part Number: SUM-GP404043

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4.040+5 1.0 1.0 2.0 8CYL

Part Number: TSR-CS1124040

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Estimated Ship Date: Mar 12, 2026 if ordered today

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Piston Rings, Plasma-Moly, 4.040 in. Bore, 1/16 in., 1/16 in., 3/16 in. Thickness, 1-Cylinder, Set

Part Number: JEP-S100S1-40405

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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, Plasma-Moly, 4.040 in. Bore, 1/16 in., 1/16 in., 1/8 in. Thickness, 8-Cylinder, Set

Part Number: HRS-HRC487040405

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Estimated Ship Date: Apr 22, 2026 if ordered today

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Piston Rings, Performance, HV385 Thermal, 4.040 in. Bore, File Fit, 1.0mm, 1.0mm, 2.0mm Thickness, L1, Set

Part Number: MLE-4045MS112-1

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Piston Rings, Steel, 4.045 in. Bore, 1.5mm, 1.5mm, 3.0mm Thickness, 8-Cylinder, Set

Part Number: TSR-CS2010-45

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Piston Rings, Plasma-moly, 4.040 in. Bore, 1/16 in, 1/16 in. 3/16 in. Thickness, 8-Cylinder, Set

Part Number: JEP-J10008-40405

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Estimated Ship Date: Mar 20, 2026 if ordered today

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Piston Rings, Performance Series, 4.040 in. Bore, File Fit, 1.5mm, 1.5mm, 3.0mm, Single Piston, Set

Part Number: MLE-4045MS-15-1

5.0 out of 5 stars ( 4 )

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Piston Rings, Premium Race Series, 4.040 in. Bore, File Fit, 1.2, 1.5, 3.0mm Thickness, V8, Set

Part Number: JEP-JG31F840402

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Estimated Ship Date: Mar 20, 2026 if ordered today

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