Engine Piston Ring Set - Standard Size for 1977-1995 Chevrolet/GMC/Pontiac 4.9L 5.7L (G20, G30, P30, Blazer) E-377K
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The Hastings Engine Piston Ring Set - .030 Oversize (part number 2M5615030) is a direct-fit replacement for 1977-2002 Chevrolet, GMC, Pontiac, and Buick vehicles with 4.9L and 5.7L engines.
Specifications:
| 1st Oil Groove | 3/16 |
| 1st Oil Ring Material | STEEL RAIL/STAINLESS EXP |
| 1st Oil Ring Surface Treatment | CHROME |
| 2nd Groove | 5/64 |
| 2nd Ring Surface Treatment | PHOSPHATE |
| Bore Size (in) | 4.000 |
| Notes | W/Shallow Oil Grv. |
| Oversize (mm) | 0.75 |
| Top Groove | 5/64 |
| Top Ring Surface Treatment | PLASMA MOLY |
Fits: 1977-2002 Chevrolet, GMC, Pontiac, Buick, and Oldsmobile models including G20, G30, P30, Blazer, C1500, C2500, C3500, K1500 and more - 4.9L and 5.7L engines. Confirm your year, make, model, and engine before ordering.
Fitment Notes: Top Ring Surface Treatment: Plasma Moly; W/Shallow Oil Grv.; Weights: 1.121lb
Interchanges With: Sealed Power E377K, Sealed Power E739K