Enginetech R40054-020 is a cast .020" oversize piston ring set for 1977-1993 Chevy, GMC, Jeep, Buick 2.5L 151ci I4 engines, sold as a complete set covering all cylinders.
Important Notes:
- Sized for cylinders bored .020 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.
- Cast. 5/64 5/64 3/16. Deep oil ring. For use with P3002 (4) piston. Does not fit OE pistons.
| Part Number | R40054-020 |
| Grade | Cast |
| Bore Size | .020" Oversize |
| Ring Stack (Top/2nd/Oil) | 5/64 / 5/64 / 3/16 |
| Standard Bore Diameter | 4.000 in |
| Quantity | Complete set - covers all 4 cylinders |
| Engine | 2.5L 151ci I4 |
| Year Range | 1977-1993 |
| Makes | American, Buick, Chevrolet, GMC, Jeep, Pontiac |
| Country of Origin | US |
| OEM Cross-Refs | Hastings:5570, FEL-PRO:E-381X, Perfect Circle:51240 |
Sold as a complete piston ring set - one set covers all cylinders and is required per engine.
Fitment:
- 1977-1977 Pontiac Astre 2.5L 151ci I4
- 1977-1977 Pontiac Ventura 2.5L 151ci I4
- 1977-1978 Pontiac Phoenix 2.5L 151ci I4
- 1977-1980 Pontiac Sunbird 2.5L 151ci I4
- 1978-1979 Chevrolet Monza 2.5L 151ci I4
- 1978-1979 Pontiac Sunbird 2.5L 151ci I4
- 1978-1980 Chevrolet Monza 2.5L 151ci I4
- 1979-1979 Chevrolet Monza 2.5L 151ci I4
- 1979-1979 Pontiac Sunbird 2.5L 151ci I4
- 1980-1980 Buick Skylark 2.5L 151ci I4
- 1980-1980 Chevrolet Citation 2.5L 151ci I4
- 1980-1980 Pontiac Phoenix 2.5L 151ci I4
- 1980-1981 American Motors Concord 2.5L 151ci I4
- 1980-1981 American Motors Spirit 2.5L 151ci I4
- 1980-1981 Jeep CJ5 2.5L 151ci I4
- 1980-1981 Jeep CJ7 2.5L 151ci I4
- 1980-1981 Jeep DJ5 2.5L 151ci I4
- 1981-1981 American Motors Eagle 2.5L 151ci I4
- 1981-1981 Jeep Scrambler 2.5L 151ci I4
- 1985-1988 Chevrolet S10 Blazer 2.5L 151ci I4
- 1985-1988 GMC S15 Jimmy 2.5L 151ci I4
- 1985-1990 Chevrolet Astro 2.5L 151ci I4
- 1985-1990 GMC S15 2.5L 151ci I4
- 1985-1990 GMC Safari 2.5L 151ci I4
- 1985-1991 Chevrolet S10 2.5L 151ci I4
- 1987-1991 Chevrolet LLV 2.5L 151ci I4
- 1991-1991 GMC Sonoma 2.5L 151ci I4
- 1991-1993 Chevrolet LLV 2.5L 151ci I4
- 1991-1993 Chevrolet S10 2.5L 151ci I4
- 1991-1993 GMC Sonoma 2.5L 151ci I4
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.
