1981 CHEVROLET K20 Engines & Components - In Stock Filter Options - Vendor In Stock Filter Options

PRW Main Girdle Stud Kits 1000203

CHEV 350 Stud Kit, Main Girdle, , Includes 10ea, 1/2" Longer Studs, 7/16" -14/20 x 5.00" Studs, PRW Fasteners & Hardware.

Part Number: PQX-1000203

Not Yet Reviewed

Estimated Ship Date: Apr 2, 2026 if ordered today

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Estimated Ship Date: Apr 2, 2026 if ordered today

Sealed Power Cam Bearings 2100M

Cam Bearings, Performance, Steel Backed Babbit, Chevy, 4.6L, 5.0L, 5.4L, 5.7L, Set

Part Number: SLP-2100M

2.5 out of 5 stars ( 2 )

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Milodon Oil Filter Adapters 21565

Milodon Oil Filter Adapters 21565

Adapter, Oil Filter Bypass, Bolt-On, Chevy, Aluminum, Natural, 1/2 in. NPT Inlet/Outlet, Each

Part Number: MIL-21565

3.6 out of 5 stars ( 5 )

Estimated Ship Date: Today

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Mahle Original Premium Piston Ring Sets 40564CP.020

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: Mar 2, 2026 if ordered today

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Estimated Ship Date: Mar 2, 2026 if ordered today

Pioneer Timing Covers 500350S

Timing Cover, Steel, Natural, Chevrolet, Small Block, Each

Part Number: PIO-500350S

2.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 16, 2026 if ordered today

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Estimated Ship Date: Feb 16, 2026 if ordered today

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ATP Timing Covers 103120

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ATP Engine Oil Pans 103034

Oil Pan, Steel, Black, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: ATP-103034

Not Yet Reviewed

Estimated Ship Date: Feb 11, 2026 if ordered today

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Estimated Ship Date: Feb 11, 2026 if ordered today

Hastings Premium Ductile Ring Sets 2M5523045

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: Feb 12, 2026 if ordered today

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Estimated Ship Date: Feb 12, 2026 if ordered today

Sealed Power Main Bearing Sets 4663M 2

Main Bearings, .002 in. Over Size, Tri Metal, 1/2 Groove, Chevrolet, Small Block, Set of 5

Part Number: SLP-4663M2

Not Yet Reviewed

Estimated Ship Date: Feb 16, 2026 if ordered today

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Estimated Ship Date: Feb 16, 2026 if ordered today

Pioneer Automotive Connecting Rod Bolts S-1035

CONN ROD BOLTS

Part Number: PIO-S-1035

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Estimated Ship Date: Feb 16, 2026 if ordered today

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Estimated Ship Date: Feb 16, 2026 if ordered today

Cloyes Replacement Timing Chains 9-131-10

Replacement Timing Chain, True Roller, Chevy, Pontiac, 0.010 in. Reduced Center, Each

Part Number: CLO-9-131-10

Not Yet Reviewed

Estimated Ship Date: Feb 12, 2026 if ordered today

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Estimated Ship Date: Feb 12, 2026 if ordered today

King HP-Series Rod Bearings CR 807HPND 011

Rod Bearings, HP-Series, Silicon Aluminum, 0.011 in. Crankshaft Undersize, Large Journal, Chevy, Set of 8

Part Number: KGB-CR807HPND011

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Flex-A-Lite Oil Filter Sandwich Adapters 108595

Adapter, Oil Filter, Sandwich, Aluminum, Natural, 13/16-16 in. Thread, Each

Part Number: FLX-108595

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Cloyes Replacement Timing Chains 9-131

Replacement Timing Chain, True Roller, Chevy, Pontiac, Each

Part Number: CLO-9-131

Not Yet Reviewed

Estimated Ship Date: Feb 12, 2026 if ordered today

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Estimated Ship Date: Feb 12, 2026 if ordered today

Hastings Premium Ductile Ring Sets 2M5523035

Piston Rings, Premium Ductile Ring Sets, 0.035 in. Oversize, 4.035 in. Bore, Plasma-moly, 1/16 in., 1/16 in., 3/16 in. Thickness, L8, V8, Set of 8

Part Number: HSN-2M5523035

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Estimated Ship Date: Feb 16, 2026 if ordered today

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Estimated Ship Date: Feb 16, 2026 if ordered today

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Sealed Power File-Fit Plasma-Moly Piston Rings R977135

5 out of 5 stars ( 1 )

Estimated Ship Date: Today

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PRW Power Plus Nitro-Carb Steel Rocker Arms 6028316

Rocker Arms, Stud Mount, Non-Roller, Stamped Steel, Nitro Carb, 1.6 Ratio, Fits 3/8 in. Stud, Long Slot, Chevy, Small Block, Set of 16

Part Number: PQX-6028316

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Sealed Power MA Series Main Bearings 4124MA 40

Main Bearing Set;

Part Number: SLP-4124MA40

Not Yet Reviewed

Estimated Ship Date: Feb 16, 2026 if ordered today

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Estimated Ship Date: Feb 16, 2026 if ordered today

Hastings Premium Ductile Ring Sets 2M5523

Engine Piston Ring Set, 8-Cyl Ring Set; Plasma Moly

Part Number: HSN-2M5523

Not Yet Reviewed

Estimated Ship Date: Feb 12, 2026 if ordered today

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Estimated Ship Date: Feb 12, 2026 if ordered today

Dorman Harmonic Balancers 594-006

Harmonic Balancer, Internal Balance, Nodular Iron, Natural, Chevy/GMC Small Block, Each

Part Number: RNB-594-006

2.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Hastings Premium Ductile Ring Sets 2C139040

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

Part Number: HSN-2C139040

Not Yet Reviewed

Estimated Ship Date: Feb 16, 2026 if ordered today

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Estimated Ship Date: Feb 16, 2026 if ordered today

Sealed Power Main Bearing Sets 4663M 60

Main Bearings, .060 in. Over Size, Tri Metal, 1/2 Groove, Chevrolet, Small Block, Set of 5

Part Number: SLP-4663M60

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PRW Power Plus Nitro-Carb Steel Rocker Arms 6028315

ROCKER ARMS, STAMPED STEEL, CHEV 265-400, 1955-86, 1.5 x 3/8", Long Slot, Nitro-Carburized

Part Number: PQX-6028315

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Sealed Power Performance Piston Ring Sets E-217K 30

Piston Rings, Moly, 3.905 in. Bore, 3/32 in., 3/32 in., 3/16 in. Thickness, L6, Set

Part Number: SLP-E-217K30

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Hastings Claimer Series Performance Piston Ring Sets CM5531040

Engine Piston Ring Set, 8-Cyl Ring Set; Plasma Moly

Part Number: HSN-CM5531040

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Pioneer Balancers DA-3504

Harmonic Balancer, Internal Balance, 7.990 in. Diameter, Nodular Iron, Chevy/GMC/Pontiac, Small Block, Each

Part Number: PIO-DA-3504

Not Yet Reviewed

Estimated Ship Date: Feb 16, 2026 if ordered today

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Hastings Premium Ductile Ring Sets 2C139060

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

Part Number: HSN-2C139060

Not Yet Reviewed

Estimated Ship Date: Feb 16, 2026 if ordered today

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Estimated Ship Date: Feb 16, 2026 if ordered today