Sealed Power W454NP Engine Piston

Engine Piston for GM 3.736 Bore Applications

Sealed Power W454NP is a standard-size cast engine piston built for select GM V8 applications that use a 3.7360-inch bore and an 8.5:1 compression ratio. It is a recessed-head piston with a 1.540-inch compression distance, making it a direct-spec replacement for classic Buick, Chevrolet, GMC, Oldsmobile, and Pontiac engines.

• Standard-size cast piston for 3.7360-inch bore applications
• Recessed head design: .110 deep x 3.115 diameter
• 8.5:1 compression ratio specification
• 1.540-inch compression distance
• Pin diameter: 0.9275 inch
• Pin offset: 0.06 inch
• Ring groove widths: 5/64, 5/64, and 3/16
• Minimum clearance: 0.001 at 2.200 from top of head

Detailed Product Overview

The Sealed Power W454NP piston is engineered for engine rebuilds that require accurate bore, compression, and ring-groove dimensions. Its cast construction and recessed-head profile support the factory-style compression setup used in many 1976-1987 Buick Regal, Chevrolet Camaro, Caprice, Monte Carlo, and related GM platforms. This part number, W454NP, also cross-references BBB Industries 8232 for the same application.

Sealed Power uses modern materials and ISO- and QS-certified manufacturing processes to produce engine components that meet demanding service requirements. For buyers searching for a Buick Regal piston, Chevrolet Camaro piston, or GMC truck engine piston, W454NP provides the dimensional details needed for a proper rebuild decision.

Vehicle Fitment

• Fits 1982-1987 Buick Regal, N/A
• Fits 1977-1980 Buick Regal, N/A
• Fits 1976-1987 Chevrolet Camaro, N/A
• Fits 1977-1987 Chevrolet Caprice, N/A
• Fits 1976-1987 Chevrolet Monte Carlo, N/A
• Fits 1985-1987 Oldsmobile Cutlass, N/A
• Fits 1978-1980 Oldsmobile Cutlass, N/A
• Fits 1985-1987 Oldsmobile Cutlass Supreme, N/A
• Fits 1983 Oldsmobile Cutlass Supreme, N/A
• Fits 1978-1980 Oldsmobile Cutlass Supreme, N/A
• Fits 1977-1987 Pontiac Firebird, N/A
• Fits 1983-1987 Pontiac Grand Prix, N/A
• Fits 1978-1980 Pontiac Grand Prix, N/A
• Fits 1977-1986 Chevrolet C10, N/A
• Fits 1981-1986 Chevrolet C10 Suburban, N/A
• Fits 1977-1979 Chevrolet C10 Suburban, N/A
• Fits 1981-1986 Chevrolet C20, N/A
• Fits 1977-1978 Chevrolet C20, N/A
• Fits 1981-1986 Chevrolet C20 Suburban, N/A
• Fits 1977-1979 Chevrolet C20 Suburban, N/A
• Fits 1976-1986 Chevrolet El Camino, N/A
• Fits 1977-1986 Chevrolet G10, N/A
• Fits 1980-1986 Chevrolet G20, N/A
• Fits 1981-1986 Chevrolet K10, N/A
• Fits 1977-1978 Chevrolet K10, N/A
• Fits 1986 Chevrolet K10 Suburban, N/A
• Fits 1983 Chevrolet K10 Suburban, N/A
• Fits 1981 Chevrolet K10 Suburban, N/A
• Fits 1977-1979 Chevrolet K10 Suburban, N/A
• Fits 1985-1986 Chevrolet K20 Suburban, N/A
• Fits 1977-1978 Chevrolet K20 Suburban, N/A
• Fits 1977-1986 Chevrolet K5 Blazer, N/A
• Fits 1979-1986 GMC C1500, N/A
• Fits 1981-1986 GMC C1500 Suburban, N/A
• Fits 1979 GMC C1500 Suburban, N/A
• Fits 1980-1986 GMC C2500, N/A
• Fits 1982-1986 GMC C2500 Suburban, N/A
• Fits 1986 GMC C3500, N/A
• Fits 1979-1986 GMC G1500, N/A
• Fits 1981-1986 GMC G2500, N/A
• Fits 1977-1986 GMC Jimmy, N/A
• Fits 1981-1986 GMC K1500, N/A
• Fits 1983-1986 Pontiac Bonneville, N/A
• Fits 1977-1986 Pontiac Parisienne, N/A
• Fits 1985 Chevrolet G30, N/A
• Fits 1982 Chevrolet G30, N/A
• Fits 1978-1979 Chevrolet G30, N/A
• Fits 1977-1985 Chevrolet Impala, N/A
• Fits 1985 Chevrolet K20, N/A
• Fits 1977-1978 Chevrolet K20, N/A
• Fits 1983-1984 Oldsmobile Cutlass Calais, N/A
• Fits 1978-1980 Oldsmobile Cutlass Calais, N/A
• Fits 1976-1983 Chevrolet Malibu, N/A
• Fits 1982-1983 Oldsmobile Cutlass Cruiser, N/A
• Fits 1980 Oldsmobile Cutlass Cruiser, N/A
• Fits 1976-1983 Pontiac Grand LeMans, N/A
• Fits 1982 GMC K1500 Suburban, N/A
• Fits 1979 GMC K1500 Suburban, N/A
• Fits 1977-1981 Buick Century, N/A
• Fits 1981 Chevrolet Bel Air, N/A
• Fits 1980-1981 Pontiac Catalina, N/A
• Fits 1977-1981 Pontiac Laurentian, N/A
• Fits 1976-1981 Pontiac LeMans, N/A
• Fits 1980 Chevrolet Corvette, N/A
• Fits 1978-1980 Oldsmobile Cutlass Salon, N/A
• Fits 1978-1980 Pontiac Grand Am, N/A
• Fits 1977-1979 Buick Skylark, N/A
• Fits 1976-1979 Chevrolet Monza, N/A
• Fits 1976-1979 Chevrolet Nova, N/A
• Fits 1979 Chevrolet P10, N/A
• Fits 1977-1979 Oldsmobile Omega, N/A
• Fits 1977-1979 Oldsmobile Starfire, N/A
• Fits 1977-1979 Pontiac Phoenix, N/A
• Fits 1978-1979 Pontiac Sunbird, N/A
• Fits 1978 Buick LeSabre, N/A
• Fits 1978 Chevrolet C30, N/A
• Fits 1977-1978 GMC G15, N/A

Common Rebuild Uses

• Restoring correct compression in a worn GM small-block or related engine
• Replacing a damaged or scored piston during an engine overhaul
• Addressing low compression caused by piston wear or ring-groove damage
• Matching factory-style bore and compression specifications during rebuild work
• Supporting a standard-size rebuild where oversize machining is not required

Installation Notes and Tips

Verify bore size, compression distance, pin diameter, and ring groove widths before assembly. W454NP is a standard-size piston, so cylinder measurements should confirm that the block is ready for standard fitment. Check minimum clearance at the specified measurement point and confirm the recessed-head design matches the engine’s compression target before final assembly.

For best results, compare the piston to the original component and confirm application details for your Buick Regal, Chevrolet Camaro, or GMC truck engine build. Proper ring selection and machine-shop measurement are essential for a reliable rebuild.

Quality Assurance

Sealed Power manufactures engine parts using leading-edge materials and ISO- and QS-certified processes to support consistent dimensional control and service quality. The W454NP piston is built to meet the demands of modern engine service while serving classic GM rebuild applications.