GMC R2500 Melling Camshafts & Valvetrain

Lifter, Factory Hydraulic Roller Lifter, 0.842 in. O.D., Avanti, Buick, Cadillac, Chevrolet, GMC, Hummer, Isuzu, Oldsmobile, Pontiac, Saab, Each

Part Number: MEL-JB-2079

4.8 out of 5 stars ( 5 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Camshaft, Hydraulic Roller Tappet, 284/310 Advertised Duration, .470/.480 in. Lift, Chevy, Small Block, Each

Part Number: MEL-22136

4.8 out of 5 stars ( 5 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Camshaft Kit, Stock Replacement, Hydraulic Flat Tappet, Advertised Duration 258/269, .390/.409 Lift, Lifters, Buick, Chevy, GMC, Olds, Pontiac, Kit

Part Number: MEL-CL-CCS-2

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Camshaft Kit, M-Select Torque, Hydraulic Flat Tappet, Advertised Duration 278/288, Lift .420/.438, Lifters, Buick, Chevy, GMC, Chevy Small Block, Kit

Part Number: MEL-CL-MTC-1

4.75 out of 5 stars ( 8 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Lifter, Replacement, Hydraulic Flat Tappet, 0.842 in. O.D., Cadillac, Chevrolet, GMC, Pontiac, Each

Part Number: MEL-298174

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Rocker Arm, Non-roller, Stud Mount, 1.5 Ratio, Fits 3/8 in. Stud Size, Steel, Buick, Chevrolet, GMC, Oldsmobile, Pontiac, Each

Part Number: MEL-MRK401

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Pushrod, PRO-Line, Assembled, Chromoly, 5/16 in. Diameter, 7.800 in. Overall Length, Ball Tips, Each

Part Number: MEL-501004

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Lifter, Replacement, Hydraulic Flat Tappet, 0.842 in. O.D., Buick, Chevrolet, GMC, Oldsmobile, Pontiac, Studebaker, Each

Part Number: MEL-JB-817

4.0 out of 5 stars ( 5 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Pushrod, Assembled, Steel, 5/16 in. Tube Diameter, Ball Tips, 7.794 in. Overall Length, AMC, Buick, Chevy, GMC, International, Jeep, Olds, Each

Part Number: MEL-MPR-34-B

4.33 out of 5 stars ( 6 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Rocker Arm, Non-roller, Steel, Natural, Includes One Rocker Arm, One Pivot Ball and One Nut, Buick, Cadillac, Chevy, GMC, Oldsmobile, Pontiac, Kit

Part Number: MEL-MRK-651

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Timing Chain Set, Single Roller, 3-bolt, Iron Cam Gear, Steel Crank Gear, for Engines without Factory Roller Camshaft, Chevrolet, GMC, Big Block, Set

Part Number: MEL-40510

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Camshaft, M-Select Class 2, Hydraulic Roller, Retro-fit, 296/308 Advertised Duration, 0.527 in./0.544 in. Lift, Chevrolet, GMC, Big Block, Each

Part Number: MEL-22236

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Camshaft, Stock Replacement, Hydraulic Flat Tappet, Advertised Duration 258/269, Lift .390/.409, Buick, Chevy, GMC, Oldsmobile, Pontiac, Each

Part Number: MEL-CCS-2

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Timing Chain and Gear Set, Double Roller, Iron Cam Gear, Steel Crank Gear, Buick, Cadillac, Chevy, GMC, Olds, Pontiac, Chevy Small Block Gen I, Set

Part Number: MEL-40201

Not Yet Reviewed

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Rocker Arm Nut, Self-locking, Non-roller, 3/8-24 in. Stud Thread Diameter, for Use with Press-in Studs, AMC, Buick, Cadillac, Chevy, Ford, GMC, Each

Part Number: MEL-MRM-1786

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Camshaft, Hydraulic Flat Tappet, Advertised Duration 288/298, Lift .444/.466, Chevy, Small Block, Each

Part Number: MEL-22203

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Lifter, Factory Hydraulic Roller Lifter, 0.921 in. O.D., AM General, Buick, Cadillac, Chevy, Ford, GMC, Hummer, International, Olds, Pontiac, Each

Part Number: MEL-JB-2104

2.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Camshaft, Hydraulic Roller Tappet, 265/274 Advertised Duration, .470/.490 in. Lift, Chevy, Small Block, Each

Part Number: MEL-22135

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Camshaft, Hydraulic Flat Tappet, Advertised Duration 287/287, Lift .480/.480, Chevy, Small Block, Each

Part Number: MEL-22301

5.0 out of 5 stars ( 7 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

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Camshaft, M-Select Class 2, Hydraulic Flat Tappet, 290/290 Advertised Duration, 0.447 in./0.447 in. Lift, Cadillac, Chevy, GMC, Chevy Small Block,Each

Part Number: MEL-22200

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Valve, Intake, Steel, 2.065 in. Valve Head Diameter, 0.371 in. Stem, 5.225 in. Overall Length, Chevrolet, GMC, Each

Part Number: MEL-V1107

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Pushrod, Assembled, Steel, 5/16 in. Tube Diameter, Ball Tips, 7.192 in. Overall Length, Buick, Cadillac, Chevrolet, GMC, Oldsmobile, Pontiac, Each

Part Number: MEL-MPR-373

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Pushrod, PRO-Line, Assembled, Chromoly, 3/8 in. Tube Diameter, 8.280 in. Overall Length, Ball Tips, Chevrolet, GMC, Each

Part Number: MEL-500154

Not Yet Reviewed

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Camshaft, M-Select Class 1, Hydraulic Flat Tappet, Advertised Duration 278/288, Lift .420/.433, Buick, Chevy, GMC, Olds, Chevy Small Block Gen I, Each

Part Number: MEL-MTC-1

3.2 out of 5 stars ( 5 )

Estimated Ship Date: Monday 4/20/2026 if shipped by air

Valve Spring, Single, 1.238 in. O.D., 84 lbs. Seat Pressure, Buick, Cadillac, Chevrolet, GMC, Oldsmobile, Pontiac, Each

Part Number: MEL-VS-380

Not Yet Reviewed

Estimated Ship Date: Monday 4/20/2026 if shipped by air