6135-4180 400 - 4.250 Stroke Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.99" Comp Height: 1.285" Engine Size 400 - 4.375 Stroke 406 Pontiac Early and Late

406 Pontiac Early and Late

02 NOTE: Most FE‑series OEM connecting rods require narrowing at the pin end to achieve proper side clearance within the 2

Approx Comp Ratio: 62cc-9

382 Small Block Chevy

469 Pontiac Late

6135-4180 400 - 4.250 Stroke Pontiac Late FX Series -18cc Dish Top Pontiac Late Forged Piston Set 4.180 inch bore Pin Dia.: 0.99" Comp Height: 1.285" Engine Size 400 - 4.375 Stroke 406 Pontiac Early and Late467 Pontiac Late , FX, Comp Height: 1. 285, 18cc Dish Top, PIN: . 99", Full Floating or Press Fit, Ring Groove: 1. 2 1. 2 3MM, Stroke: 4. 250", ROD: 6. 8, Approx Comp Ratio: 62cc 11. 75, 87cc 9. 39, 124cc 7. 34 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.