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

King HP-Series Main Bearings MB 557HP 011

Main Bearings, HP-Series, Silicon Aluminum, 0.011 in. Crankshaft Undersize, Chevy, Small Block, Set of 5

Part Number: KGB-MB557HP011

Not Yet Reviewed

Estimated Ship Date: May 19, 2026 if ordered today

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Estimated Ship Date: May 19, 2026 if ordered today

Proform GM Licensed Diecast Aluminum Chevrolet Valve Covers 141-121

Valve Covers, Tall, Die-Cast Aluminum, Carbon Fiber Finish, Bowtie Emblem, Chevy, Small Block, Pair

Part Number: PRO-141-121

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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COMP Cams Drag Race Camshafts 12-327-5

COMP Cams Drag Race Camshafts 12-327-5

Camshaft, Hydraulic Flat Tappet, Advertised Duration 305/305, Lift .525/.525, Chevy, Small Block, Each

Part Number: CCA-12-327-5

Not Yet Reviewed

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ACDelco V-Ribbed Accessory Belts 88934320

Accessory Belts, V-groove, 41.08 in. Length, for use on Acura®, BMW, Buick, Chevy, Chrysler, Dodge, Ford, GMC, Mercedes-Benz, Olds, Saab, Volvo, Each

Part Number: ADO-15405

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Melling Pushrods MPR-318

Push Rod, Steel, 5/16 in. Diameter, Ball/Ball Ends, 11.382 in. Length, Each

Part Number: MEL-MPR-318

Not Yet Reviewed

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PRW Billet Rocker Arm Stud Girdles 1535003

Rocker Arm Stud Girdle, Solid Bar, Polylock, Aluminum, Natural, Chevrolet, Stock Heads, Kit

Part Number: PQX-1535003

2.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 23, 2026 if ordered today

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Estimated Ship Date: Apr 23, 2026 if ordered today

Proform Harmonic Balancer Covers 66517CC

Harmonic Balancer Cover, Aluminum, Chrome, 6 3/4 in. Diameter, Degree Markings, Chevy, Small Block, Each

Part Number: PRO-66517CC

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

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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: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

ATP Timing Covers 103120

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King SI-Series Rod Bearings CR 865SI 020

Rod Bearings, .020 in Crankshaft Undersize, Bi-metal, Silicon Aluminum, Set of 8

Part Number: KGB-CR865SI020

Not Yet Reviewed

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Sealed Power A-Series Rod Bearings 8-2555A X2

Connecting Rod Bearing Set

Part Number: SLP-82555AX2

Not Yet Reviewed

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Continental OE Technology Series V-belts 13465

Belt, Elite, V-Belt, 3/8 in. Width, 46.50 in. Length, Each

Part Number: CEL-13465

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Melling High-Pressure Oil Pump Springs 55049

Oil Pump Springs, 49 psi, Steel, Green, Pins, Chevy, Small Block, Kit

Part Number: MEL-55049

5.0 out of 5 stars ( 7 )

Estimated Ship Date: Today

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Melling Performance PRO-Line Pushrods 501034

Pushrod, Chromoly, 5/16 in. Diameter, 8.000 in. Length, Ball Ends, Each

Part Number: MEL-501034

Not Yet Reviewed

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VEGE Remanufactured Long Block Crate Engines VC121P

Crate Engine, Remanufactured, Long Block, Chevrolet, GMC, Workhorse, 5.7L/350, Each

Part Number: VRE-VC121P

Not Yet Reviewed

Estimated Ship Date: Apr 3, 2026 if ordered today

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Estimated Ship Date: Apr 3, 2026 if ordered today

COMP Cams Specialty Camshafts 12-865-9

Camshaft; Drag Race; Camshaft; Mech. Roller; 4500-7800rpm; Adv. Dur. 307 Int./317 Exh.; Valve Lift .684 Int./.

Part Number: CCA-12-865-9

Not Yet Reviewed

Estimated Ship Date: Apr 14, 2026 if ordered today

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Estimated Ship Date: Apr 14, 2026 if ordered today

COMP Cams Oval Track Camshafts 12-859-9

Camshaft, Oval Track, Mechanical Roller Tappet, RPM Range 3,500-7,600, Advertised Duration 285/298, Chevrolet, Each

Part Number: CCA-12-859-9

Not Yet Reviewed

Estimated Ship Date: Apr 14, 2026 if ordered today

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Estimated Ship Date: Apr 14, 2026 if ordered today

Pioneer Automotive Connecting Rod Bolts S-1035

CONN ROD BOLTS

Part Number: PIO-S-1035

Not Yet Reviewed

Estimated Ship Date: Mar 10, 2026 if ordered today

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Estimated Ship Date: Mar 10, 2026 if ordered today

Melling Performance PRO-Line Pushrods 501024

Pushrod, Chromoly, 5/16 in. Diameter, 7.950 in. Length, Ball Ends, Each

Part Number: MEL-501024

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Hastings Piston Ring Sets 139010

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

Part Number: HSN-139010

Not Yet Reviewed

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Melling M-Select Class 2 Camshafts 22233

Camshaft, Hydraulic Flat Tappet, 300/300 Advertised Duration, .436/.436 in. Lift, Chevy, Small Block, Each

Part Number: MEL-22233

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Mar 17, 2026 if ordered today

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Estimated Ship Date: Mar 17, 2026 if ordered today

COMP Cams Dual Energy Camshafts 12-209-3

Camshaft, Hydraulic Flat Tappet, Advertised Duration 275/277, Lift .462/.482, Chevy, Small Block, Each

Part Number: CCA-12-209-3

Not Yet Reviewed

Estimated Ship Date: Apr 14, 2026 if ordered today

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Estimated Ship Date: Apr 14, 2026 if ordered today

COMP Cams Xtreme Marine Camshafts 12-232-3

Camshaft, Hydraulic Flat Tappet, Advertised Duration 256/262, Lift .447/.462, Chevy, Small Block, Each

Part Number: CCA-12-232-3

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Summit Racing™ Timing Chain and Gear Set Pro Packs 09-0005

Combo, Timing Chain and Gears, Gasket Set, Rocker Arm Clips, Assembly Lube, Chevy, Small Block, Kit

Part Number: CMB-09-0005

Not Yet Reviewed

Cannot be shipped Internationally

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Cannot be shipped Internationally

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

Not Yet Reviewed

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PRW Fabricated Valve Covers 4035037

Valve Covers, Tall, Centerbolt Mounting, Fabricated Aluminum, Black Anodized, Chevy, Small Block, Pair

Part Number: PQX-4035037

Not Yet Reviewed

Estimated Ship Date: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today