Enginetech M37458-040 Premium .040″ Oversize Piston Ring Set for 1976-1996 Chevy GMC Buick 3.8L-5.0L 229-305ci V6 – Complete Engine Ring Set

Description

Enginetech M37458-040 is a premium .040″ oversize piston ring set for 1976-1996 Chevy, GMC, Buick, Oldsmobile 3.8L-5.0L 229-305ci V6 engines, sold as a complete set covering all cylinders.

Important Notes:

• Sized for cylinders bored .040 inch oversize. Verify your finished bore diameter with a precision gauge before ordering – rings sized for the wrong bore will not seal correctly.
• File-fit and gap each ring to the manufacturer’s end-gap specification for your application before installation. Improper end gap causes blow-by or ring-end butting under heat.
• Replace piston rings as a complete set during any rebuild. One set covers all cylinders for the engine.
• Premium. 5/64 5/64 3/16.
• Premium. Ductile top. 5/64 5/64 3/16. Deep oil ring. Does not fit OE pistons.

Sold as a complete piston ring set – one set covers all cylinders and is required per engine.

Fitment:

• 1976-1976 Chevrolet Camaro 5.0L 305ci V8
• 1976-1976 Chevrolet Laguna 5.0L 305ci V8
• 1976-1976 Chevrolet Malibu 5.0L 305ci V8
• 1976-1976 Chevrolet Monte Carlo 5.0L 305ci V8
• 1976-1976 Chevrolet Monza 5.0L 305ci V8
• 1976-1976 Chevrolet Nova 5.0L 305ci V8
• 1976-1977 GMC Sprint 5.0L 305ci V8
• 1976-1987 Chevrolet El Camino 5.0L 305ci V8
• 1977-1977 Pontiac Ventura 5.0L 305ci V8
• 1977-1977 Chevrolet C10 5.0L 305ci V8
• 1979-1986 Chevrolet C10 5.0L 305ci V8
• 1977-1978 Buick Century 5.0L 305ci V8
• 1977-1978 Buick Regal 5.0L 305ci V8
• 1977-1978 Buick Skylark 5.0L 305ci V8
• 1977-1978 Chevrolet Camaro 5.0L 305ci V8
• 1977-1978 Chevrolet Impala 5.0L 305ci V8
• 1977-1978 Chevrolet Malibu 5.0L 305ci V8
• 1977-1978 Chevrolet Monte Carlo 5.0L 305ci V8
• 1977-1978 Chevrolet Monza 5.0L 305ci V8
• 1977-1978 Chevrolet Nova 5.0L 305ci V8
• 1977-1978 GMC C15 5.0L 305ci V8
• 1977-1978 GMC C15 Suburban 5.0L 305ci V8
• 1977-1978 GMC C25 5.0L 305ci V8
• 1977-1978 GMC C25 Suburban 5.0L 305ci V8
• 1977-1978 GMC G15 5.0L 305ci V8
• 1977-1978 GMC K15 5.0L 305ci V8
• 1977-1978 GMC K15 Suburban 5.0L 305ci V8
• 1977-1978 GMC K25 5.0L 305ci V8
• 1977-1978 GMC K25 Suburban 5.0L 305ci V8
• 1977-1978 Oldsmobile Omega 5.0L 305ci V8
• …and 132 additional applications

Enginetech piston ring sets are manufactured to OEM specifications and offered in both premium and cast grades to match the demands of stock rebuilds and moderate-performance builds. Each set is application-specific, with ring widths and end-gap characteristics matched to the bore and groove geometry of the engine family it serves. Ring sets are sold by bore size – standard for unmachined bores, with oversizes for blocks that have been bored and honed – so verify your finished bore diameter with a precision gauge before ordering, since rings sized for the wrong bore will not seal correctly. Always file-fit and gap each ring to the manufacturer’s specification for your application, and replace rings as a complete set during any rebuild. Enginetech documents every set with the ring stack dimensions, bore size, and cross-references so the correct set reaches the bench the first time.

WARNING: This product can expose you to chemicals including lead and nickel, which are known to the State of California to cause cancer, birth defects, or other reproductive harm.