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

Hastings Premium Ductile Ring Sets 2M8542065

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

Part Number: HSN-2M8542065

Not Yet Reviewed

Estimated Ship Date: Jan 15, 2026 if ordered today

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Estimated Ship Date: Jan 15, 2026 if ordered today

PRW Sportsman Steel Roller Tip Rocker Arms 0835021-01

Rocker Arms, Sportsman Steel Roller Tip, Stud Mount, Chromoly Steel, Natural, 1.6 Ratio, Fits 7/16 in. Stud, Chevy, Small Block, Each

Part Number: PQX-0835021-01

Not Yet Reviewed

Estimated Ship Date: Mar 3, 2026 if ordered today

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Estimated Ship Date: Mar 3, 2026 if ordered today

Melling Camshaft Thrust Plates MG221

Melling Camshaft Thrust Plates MG221

Camshaft Thrust Plate Shim Washer, Brass, AMC, Buick, Chevy, Jeep, Oldsmobile, Pontiac, Studebaker, Each

Part Number: MEL-MG221

Not Yet Reviewed

Estimated Ship Date: Friday 1/2/2026

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Estimated Ship Date: Friday 1/2/2026

ATP Graywerks Harmonic Balancers 102070

Harmonic Balancer, Internal Balance, Nodular Iron, Chevy/GMC, Inline 6, Each

Part Number: ATP-102070

Not Yet Reviewed

Estimated Ship Date: Jan 14, 2026 if ordered today

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Estimated Ship Date: Jan 14, 2026 if ordered today

Hastings Premium Ductile Ring Sets 2M5523065

Piston Rings, Premium Ductile Ring Sets, 0.065 in. Oversize, 4.065 in. Bore, Plasma-moly, 1/16 in., 1/16 in., 3/16 in. Thickness, V8, Set of 8

Part Number: HSN-2M5523065

Not Yet Reviewed

Estimated Ship Date: Jan 15, 2026 if ordered today

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Estimated Ship Date: Jan 15, 2026 if ordered today

ATI Replacement Hubs ATI916951K

Balancer Hub, Internal Engine Balance, Buick, Chevy, GMC, Olds, Pontiac, Chevy Small Block, Each

Part Number: ATI-916951K

Not Yet Reviewed

Estimated Ship Date: Jan 16, 2026 if ordered today

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Estimated Ship Date: Jan 16, 2026 if ordered today

King SI-Series Rod Bearings CR 641SI

Connecting Rod Bearings GENERAL MOTORS 292ci 4.8L

Part Number: KGB-CR641SI

Not Yet Reviewed

Estimated Ship Date: Mar 30, 2026 if ordered today

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Estimated Ship Date: Mar 30, 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: Jan 16, 2026 if ordered today

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Estimated Ship Date: Jan 16, 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

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 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: Friday 1/2/2026

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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

Not Yet Reviewed

Estimated Ship Date: Friday 1/2/2026

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Estimated Ship Date: Friday 1/2/2026

PRW Valve Cover Fasteners 4135030

Valve Cover Bolt Kit

Part Number: PQX-4135030

Not Yet Reviewed

Estimated Ship Date: Mar 3, 2026 if ordered today

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Estimated Ship Date: Mar 3, 2026 if ordered today

Hastings Premium Ductile Ring Sets 2M668030

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

Part Number: HSN-2M668030

Not Yet Reviewed

Estimated Ship Date: Jan 16, 2026 if ordered today

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Estimated Ship Date: Jan 16, 2026 if ordered today

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: Jan 16, 2026 if ordered today

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Estimated Ship Date: Jan 16, 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: Friday 1/2/2026

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Estimated Ship Date: Friday 1/2/2026

Hastings Steel Series Performance Ring Sets SM5587S035

Engine Piston Ring Set, Single Cyl Ring Set; Plasma Moly

Part Number: HSN-SM5587S035

Not Yet Reviewed

Estimated Ship Date: Jan 15, 2026 if ordered today

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Estimated Ship Date: Jan 15, 2026 if ordered today

Mr. Gasket Alternator Brackets 5176

Bracket, Alternator, Steel, Chrome, Upper, High Tech Style, Chevy, Small Block, Each

Part Number: MRG-5176

3.5 out of 5 stars ( 2 )

Estimated Ship Date: Jan 23, 2026 if ordered today

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Estimated Ship Date: Jan 23, 2026 if ordered today

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Summit Racing™ Alternator Brackets SUM-G4021

4.5 out of 5 stars ( 5 )

Estimated Ship Date: Friday 1/2/2026

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Hastings Steel Series Performance Ring Sets SM5587S

Engine Piston Ring Set, Single Cyl Ring Set; Plasma Moly

Part Number: HSN-SM5587S

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 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

Not Yet Reviewed

Estimated Ship Date: Friday 1/2/2026

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Estimated Ship Date: Friday 1/2/2026

Hastings Premium Ductile Ring Sets 2M5538S030

Engine Piston Ring Set, Single Cyl Ring Set; Plasma Moly

Part Number: HSN-2M5538S030

Not Yet Reviewed

Estimated Ship Date: Friday 1/2/2026

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Estimated Ship Date: Friday 1/2/2026

PRW Pushrod Guideplates (PowerPlus+) 1135002

Guideplates, PowerPlus+, Raised, Steel, Black Oxide, 3/8 in. Pushrod Size, Chevrolet, Set of 8

Part Number: PQX-1135002

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

PRW Pushrod Guideplates (PowerPlus+) 1135001

Guideplates, PowerPlus+, Flat, Steel, Black Oxide, 5/16 in. Pushrod Size, Chevrolet, Set of 8

Part Number: PQX-1135001

Not Yet Reviewed

Estimated Ship Date: Mar 4, 2026 if ordered today

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Estimated Ship Date: Mar 4, 2026 if ordered today

PRW Power Timing Chain and Gear Sets 5099130

TIMING CHAIN, DBL ROLLER, CHEV SB V6 & V8, FORD SB V8, 58 Link

Part Number: PQX-5099130

Not Yet Reviewed

Estimated Ship Date: Mar 3, 2026 if ordered today

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Estimated Ship Date: Mar 3, 2026 if ordered today

Continental OE Technology Series V-belts 15382

Belt, Elite, V-Belt, 7/16 in. Width, 37.50 in. Length, Each

Part Number: CEL-15382

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Dayco High Performance V-Belts 15375

5 out of 5 stars ( 1 )

Estimated Ship Date: Friday 1/2/2026

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Melling Performance PRO-Line Pushrods 500674

Pushrod, Chromoly, 3/8 in. Diameter, 7.894 in. Length, Ball Ends, Each

Part Number: MEL-500674

Not Yet Reviewed

Estimated Ship Date: Friday 1/2/2026

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Estimated Ship Date: Friday 1/2/2026

PRW Elite Series Stainless Steel Full Roller Rocker Arms 62350316

Rocker Arms, Elite Series, Stud Mount, Full Roller, Stainless Steel, 1.6 Ratio, Fits 3/8 in. Stud, Chevy, Small Block, Set of 16

Part Number: PQX-62350316

Not Yet Reviewed

Estimated Ship Date: Friday 1/2/2026

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Estimated Ship Date: Friday 1/2/2026