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

King SI-Series Rod Bearings CR 807SI 050

Rod Bearings, .050 in Crankshaft Undersize, Bi-metal, Silicon Aluminum, Large Journal, Chevy, Small Block, Set of 8

Part Number: KGB-CR807SI050

Not Yet Reviewed

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Hastings Piston Ring Sets C5532040

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

Part Number: HSN-C5532040

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

Dorman Oil Pan Drain Plugs 65202

Oil Pan Drain Plug, 1/2-20 in. Thread Size, Seal, Buick, Cadillac, Chevy, Chrysler, Dodge, Eagle, GMC, Jeep, Oldsmobile, Plymouth, Pontiac, Each

Part Number: RNB-65202

2.5 out of 5 stars ( 2 )

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PRW Pro Series Billet Aluminum Rocker Arms 6532704

ROCKER ARMS, PRO SERIES ALUM, CHEV 262-400 1955-86, 1.6 x 3/8"

Part Number: PQX-6532704

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

PRW Pro Series Billet Aluminum Rocker Arms 6535012

ROCKER ARMS, PRO SERIES ALUM, CHEV 262-400 1955-86, 1.6 x 7/16", Super Duty

Part Number: PQX-6535012

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

Mahle Original OE Replacement Pistons S224-3543.020

Single Piston

Part Number: MAH-S2243543020

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Estimated Ship Date: Mar 25, 2026 if ordered today

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Estimated Ship Date: Mar 25, 2026 if ordered today

Pioneer Automotive Valve Locks SS-555-HD

Valve Locks

Part Number: PIO-SS-555-HD

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

PRW Valve Cover Fasteners 4135010

Valve Cover Bolt Kit

Part Number: PQX-4135010

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

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: Mar 10, 2026 if ordered today

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Estimated Ship Date: Mar 10, 2026 if ordered today

Melling High-Pressure Oil Pump Springs 5556F

Melling High-Pressure Oil Pump Springs 5556F

Oil Pump Springs, 55 psi of Force, Steel, Chevy, Small Block, Each

Part Number: MEL-5556F

1.0 out of 5 stars ( 1 )

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Fram Defense Oil Filters DL5

Oil Filter, Defense, Canister Style, Each

Part Number: FRM-DL5

Not Yet Reviewed

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Proform Guideplates 66881

Guideplates, Raised, Hardened, 5/16 in. Pushrod Size, Chevy, Small Block, Set of 8

Part Number: PRO-66881

Not Yet Reviewed

Estimated Ship Date: Mar 12, 2026 if ordered today

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Estimated Ship Date: Mar 12, 2026 if ordered today

COMP Cams Nitrous HP Camshafts 12-564-4

Camshaft, Hydraulic Flat Tappet, Advertised Duration 274/292, Lift .487/.501, Chevy, Small Block, Each

Part Number: CCA-12-564-4

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 15, 2026 if ordered today

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Estimated Ship Date: Apr 15, 2026 if ordered today

Need It Sooner? We recommend these similar substitute parts:

Summit Racing™ Classic SBC Camshaft SUM-1107

4.5 out of 5 stars ( 22 )

Estimated Ship Date: Today

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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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King HP-Series Main Bearings MB 557HP 030

Main Bearings, HP-Series, Silicon Aluminum, 0.030 in. Crankshaft Undersize, Chevy, Small Block, Set of 5

Part Number: KGB-MB557HP030

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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

Not Yet Reviewed

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Cloyes Hex-A-Just Z-Racing Timing Sets 9-3100BZ

Timing Chain and Gear Set, Z-Racing Hex-A-Just, Double Roller, Billet Steel Sprockets, Chevy, Small Block, BBC Crank Snout, Set

Part Number: CLO-9-3100BZ

Not Yet Reviewed

Estimated Ship Date: Mar 6, 2026 if ordered today

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Estimated Ship Date: Mar 6, 2026 if ordered today

Trans-Dapt Performance Slam-Guard Oil Pans 8650

80-85 SB CHEVY SLAMGUARD OIL PAN- ASPHALT BLACK POWDERCOAT

Part Number: TRD-8650

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Hastings Steel Series Performance Ring Sets SM8556065

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

Part Number: HSN-SM8556065

Not Yet Reviewed

Estimated Ship Date: Mar 9, 2026 if ordered today

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Estimated Ship Date: Mar 9, 2026 if ordered today

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: Mar 6, 2026 if ordered today

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Estimated Ship Date: Mar 6, 2026 if ordered today

Denso Oil Filters 150-2056

Oil Filter, 13/16-16 in. Thread, 4.488 in. Height, Each

Part Number: DNP-150-2056

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Sealed Power A-Series Rod Bearings 2555A 20

Rod Bearing, 0.020 in. Crankshaft Undersize, Bi Metal, AM General, Avanti, Buick, Chevy, GMC, Oldsmobile, L6, V8

Part Number: SLP-2555A20

Not Yet Reviewed

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Mahle Original Aftermarket Replacement Pistons 224-3547.040

Piston - GM 5.7L (350) V8 FLATTOP COAT (040) W/P AFTERMARKET VERSION

Part Number: MAH-2243547040

Not Yet Reviewed

Estimated Ship Date: Mar 25, 2026 if ordered today

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Estimated Ship Date: Mar 25, 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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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: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today