1981 CHEVROLET K20 Piston Rings

Piston Rings, Moly, 4.030 in. Bore, 5/64 in., 5/64 in., 3/16 in. Thickness, 8-Cylinder, Set

Part Number: SLP-E-251K30

4.4 out of 5 stars ( 47 )

Estimated Ship Date: Today

Piston Rings, Plasma-moly, 4.030 in. Bore, 5/64 in., 5/64 in., 3/16 in. Thickness, 8-Cylinder, Set

Part Number: HSN-2M139030

4.64 out of 5 stars ( 14 )

Estimated Ship Date: Today

Piston Rings, Plasma-moly, 4.000 in. Bore, 5/64 in., 5/64 in., 3/16 in. Thickness, 8-Cylinder, Set

Part Number: HSN-2M139

3.8 out of 5 stars ( 10 )

Estimated Ship Date: Today

Piston Rings, Plasma-moly, 4.030 in. Bore, 5/64 in., 5/64 in., 3/16 in. Thickness, 8-Cylinder, Set

Part Number: MAH-40564CP030

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

Piston Rings, Piston Ring Sets, Phosphate Coated, 4.030 in. Bore, 1/16 in., 1/16 in., 3/16 in. Thickness, L8, V8, Set of 8

Part Number: HSN-C5532030

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

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

Part Number: MAH-40564CP040

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Piston Rings, Premium Ductile Ring Sets, 0.030 in. Oversize, 4.030 in. Bore, Plasma-moly, 1/16 in., 1/16 in., 3/16 in. Thickness, L8, V8, Set of 8

Part Number: HSN-2M5523030

Not Yet Reviewed

Estimated Ship Date: Today

Piston Rings, Plasma-moly, 4.039 in. Bore, 5/64 in., 5/64 in., 3/16 in. Thickness, 8-Cylinder, Set

Part Number: HSN-2M139040

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

Piston Rings, Plasma-moly, 4.060 in. Bore, 5/64 in., 5/64 in., 3/16 in. Thickness, 8-Cylinder, Set

Part Number: MAH-40564CP060

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Piston Rings, Cast Iron, 4.030 in. Bore, 5/64 in., 5/64 in., 3/16 in. Thickness, 8-Cylinder, Set

Part Number: SLP-E-251KC30

4.75 out of 5 stars ( 4 )

Estimated Ship Date: Today

Piston Rings, Plasma-moly, 4.000 in. Bore, 5/64 in., 5/64 in., 3/16 in. Thickness, 8-Cylinder, Set

Part Number: MAH-40564CP

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

Piston Rings, Moly, 4.010 in. Bore, 5/64 in., 5/64 in., 3/16 in. Thickness, 8-Cylinder, Set

Part Number: SLP-E-251K10

3.75 out of 5 stars ( 4 )

Estimated Ship Date: Today

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

Part Number: SLP-E-251KC40

Not Yet Reviewed

Estimated Ship Date: Today

Piston Rings, Plasma-moly, 4.020 in. Bore, 5/64 in., 5/64 in., 3/16 in. Thickness, 8-Cylinder, Set

Part Number: MAH-40564CP020

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Piston Rings, Chrome, 4.000 in. Bore, 5/64 in., 5/64 in., 3/16 in. Thickness, 8-Cylinder, Set

Part Number: SLP-E-251KC

Not Yet Reviewed

Estimated Ship Date: Today

Piston Rings, Premium Ductile Ring Sets, 0.045 in. Oversize, 4.045 in. Bore, Plasma-moly, 1/16 in., 1/16 in., 3/16 in. Thickness, L8, V8, Set of 8

Part Number: HSN-2M5523045

Not Yet Reviewed

Estimated Ship Date: Jan 23, 2026 if ordered today

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Engine Piston Ring Set, 6-Cyl Ring Set; Plasma Moly

Part Number: HSN-2M668030

Not Yet Reviewed

Estimated Ship Date: Jan 23, 2026 if ordered today

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Engine Piston Ring Set, 8-Cyl Ring Set; Triple Chrome

Part Number: HSN-2C139040

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Estimated Ship Date: Jan 23, 2026 if ordered today

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Engine Piston Ring Set, 8-Cyl Ring Set; Triple Chrome

Part Number: HSN-2C139010

Not Yet Reviewed

Estimated Ship Date: Jan 23, 2026 if ordered today

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Engine Piston Ring Set, 8-Cyl Ring Set; Triple Chrome

Part Number: HSN-2C139060

Not Yet Reviewed

Estimated Ship Date: Jan 23, 2026 if ordered today

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Engine Piston Ring Set, 6-Cyl Ring Set; Phosphate

Part Number: HSN-668020

Not Yet Reviewed

Estimated Ship Date: Jan 23, 2026 if ordered today

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Engine Piston Ring Set, 6-Cyl Ring Set; Plasma Moly

Part Number: HSN-2M668080

Not Yet Reviewed

Estimated Ship Date: Jan 23, 2026 if ordered today

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Engine Piston Ring Set, 8-Cyl Ring Set; Phosphate

Part Number: HSN-C5532040

Not Yet Reviewed

Estimated Ship Date: Jan 23, 2026 if ordered today

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Engine Piston Ring Set, 6-Cyl Ring Set; Phosphate

Part Number: HSN-668030

Not Yet Reviewed

Estimated Ship Date: Jan 22, 2026 if ordered today

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Engine Piston Ring Set, 6-Cyl Ring Set; Phosphate

Part Number: HSN-668080

Not Yet Reviewed

Estimated Ship Date: Jan 23, 2026 if ordered today

• Drop Ship
• Special Order