6120-4160 455 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.160 inch bore Pin Dia.: 0.98" Comp Height: 1.48" Bore Size 3592 in 91165 mm Please specify the correct part

Please specify the correct part # of the ring set you need a replacement for in the note section of the checkout page

445 Small Block Ford 351W

01 Effective June 15th 2026

406 Big Block Oldsmobile

6120-4160 455 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.160 inch bore Pin Dia.: 0.98" Comp Height: 1.48" Bore Size 3592 in 91165 mm Please specify the correct part458 Pontiac Late , FX, Comp Height: 1. 48, 7cc Flat Top , PIN: . 98", Full Floating or Press Fit, Ring Groove: 1. 2 1. 2 3MM, Stroke: 4. 210", ROD: 6. 625, Approx Comp Ratio: 62cc 13. 05, 87cc 10. 12, 124cc 7. 7 Effective June 15th 2026, These Pontiac ring grooves have been updated to the new specifications of 1. 2 1. 2 3mm. Parts manufactured prior to this date feature ring grooves with dimensions of 1 16 1 16 3 16.