United Engine & Machine Engines & Components

Piston Rings, 4.000 in. Bore, 1/16 in., 1/16 in., 3/16 in., Iron, Moly, Set of 8

Part Number: UEM-4000BM8-STD

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 24, 2026 if ordered today

• Special Order

Piston Rings, 3.935 in. Bore, 5/64 in., 5/64 in., 3/16 in., Iron, Moly, 8-Cylinder, Set

Part Number: UEM-3875AM8-060

Not Yet Reviewed

Estimated Ship Date: Mar 23, 2026 if ordered today

• Special Order

Piston Ring Set 8cyl 4.010''/ 101.85 MM 1.2mm 1.5mm 2.5mm

Part Number: UEM-2200425MM

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Estimated Ship Date: Mar 18, 2026 if ordered today

• Special Order

Piston Ring Set 8cyl 4.065''/ 103.251 MM 1.50mm 1.50mm 3.00mm

Part Number: UEM-4055CS8010

Not Yet Reviewed

Estimated Ship Date: Mar 23, 2026 if ordered today

• Special Order

Piston Rings, 4.125 in. Bore, 5/64 in., 5/64 in., 3/16 in., Iron, Moly, 8-Cylinder, Set

Part Number: UEM-4125AM8-STD

Not Yet Reviewed

Estimated Ship Date: Mar 24, 2026 if ordered today

• Special Order

Piston Ring Set 8cyl 3.8''/ 96.52 MM 1.50mm 1.50mm 3.00mm

Part Number: UEM-3780CS8020

Not Yet Reviewed

Estimated Ship Date: Mar 24, 2026 if ordered today

• Special Order

Piston Rings, 4.165 in. Bore, 5/64 in., 5/64 in., 3/16 in., Iron, Moly, 8-Cylinder, Set

Part Number: UEM-4125AM8-040

Not Yet Reviewed

Estimated Ship Date: Mar 20, 2026 if ordered today

• Special Order

Wrist Pin Retainers, Spirolox, 1.094 in. Diameter, .020 in. Thick, Each

Part Number: UEM-PRF116-3

2.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

Piston Rings, 4.390 in. Bore, 5/64 in., 5/64 in., 3/16 in., Iron, Moly, 8-Cylinder, Set

Part Number: UEM-4360AM8-030

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

• Special Order

Piston Ring Set 8cyl 3.955''/ 100.457 MM 5/64 5/64 3/16

Part Number: UEM-3875AM8080

Not Yet Reviewed

Estimated Ship Date: Mar 24, 2026 if ordered today

• Special Order

Wrist Pin, Lightweight, .984 in. Diameter, 3.000 in. Length, Each

Part Number: UEM-0984X300K

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

"RING SET 3.622 bore, .STD size, 2-1.5, 1-4.0mm, steel chrome ring set, qty 4 cyl set"

Part Number: UEM-3622DS4-STD

Not Yet Reviewed

Estimated Ship Date: Mar 11, 2026 if ordered today

• Special Order

Piston Rings, 4.040 in. Bore, 5/64 in., 5/64 in., 3/16 in., Iron, Moly, 4-Cylinder, Set

Part Number: UEM-4000AM4-040

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 24, 2026 if ordered today

• Special Order

0984X224K Wrist Pin

Part Number: UEM-0984X224K

Not Yet Reviewed

Estimated Ship Date: Today

Spacer Ring

Part Number: UEM-R-89

Not Yet Reviewed

Estimated Ship Date: Today

Piston Rings, 3.950 in. Bore, 5/64 in., 5/64 in., 3/16 in., Iron, Moly, 8-Cylinder, Set

Part Number: UEM-3910AM8-040

Not Yet Reviewed

Estimated Ship Date: Today

Piston Wrist Pin Retainers, Sprialox, Steel, 0.792 in. Pin, Keith Black Pistons, Harley-Davidson®, Each

Part Number: UEM-RRN81

Not Yet Reviewed

Estimated Ship Date: Today

Piston Rings, 4.191 in. Bore, 1/16 in., 1/16 in., 3/16 in., Ductile, Plasma-moly, File Fit, 8-Cylinder, Set

Part Number: UEM-4151BD8-045

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Piston Ring Set 8cyl 3.898''/ 99 MM 1.5mm 1.5mm 3.0mm

Part Number: UEM-3898CS8STD

Not Yet Reviewed

Estimated Ship Date: Today

Ring Set 3898 bore,

Part Number: UEM-3898ES8STD

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

Piston Rings, 3.776 in. Bore, 1.5mm, 1.5mm, 3.0mm, Ductile Iron, Plasma-moly, File Fit, 8-Cylinder, Set

Part Number: UEM-3736CD8-045

Not Yet Reviewed

Estimated Ship Date: Today

• Free Shipping

R-93 Spacer Ring

Part Number: UEM-R-93

Not Yet Reviewed

Estimated Ship Date: Today

Piston Rings, 4.000 in. Bore, 1.5mm, 1.5mm, 3.0mm, Steel, Chrome, 8-Cylinder, Set

Part Number: UEM-4000CS8-STD

Not Yet Reviewed

Estimated Ship Date: Mar 12, 2026 if ordered today

• Special Order

Piston Rings, 4.372 in. Bore, 5/64 in., 5/64 in., 3/16 in., Iron, Moly, 8-Cylinder, Set

Part Number: UEM-4342AM8-030

3.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 9, 2026 if ordered today

• Free Shipping
• Special Order

R-76 Spacer Ring

Part Number: UEM-R-76

Not Yet Reviewed

Estimated Ship Date: Mar 12, 2026 if ordered today

• Special Order