6100-4100 400 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.100 inch bore Pin Dia.: 0.98" Comp Height: 1.71" Piston Ring Kit Option:Pistons - Pins and Locs Without Rings 337 Small Block Ford 289

337 Small Block Ford 289 - 302

You can increase the service life of a block by only honing what you need to remove taper and make the cylinders round again

One Size Fits All

Effective July 7

440 Small Block Chevy

6100-4100 400 Pontiac Late FX Series -7cc Flat Top Pontiac Late Forged Piston Set 4.100 inch bore Pin Dia.: 0.98" Comp Height: 1.71" Piston Ring Kit Option:Pistons - Pins and Locs Without Rings 337 Small Block Ford 289396 Pontiac Late , FX, Comp Height: 1. 71, 7cc Flat Top , PIN: . 98", Full Floating or Press Fit, Ring Groove: 1. 2 1. 2 3MM, Stroke: 3. 750", ROD: 6. 625, Approx Comp Ratio: 62cc 11. 44, 87cc 8. 91, 124cc 6. 81 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.