5000-4090 390 FE Ford FX Series -5cc Flat Top FE Ford Forged Piston Set 4.090 inch bore Pin Dia.: 0.975" Comp Height: 1.775"398 FE Ford, FX, Comp Height: 1. 775, 5cc Flat Top , PIN: . 975", Full Floating or Press Fit, Ring Groove: 1. 2 1. 2 3MM, Stroke: 3. 784", ROD: 6. 489, Approx Comp Ratio: 65cc 11. 36, 72cc 10. 53, 76cc 10. 1 NOTE: Most FEseries OEM connecting rods require narrowing at the pin end to achieve proper side clearance within the 2. 5inch pin boss. Aftermarket rods are typic Thesey manufactured with a narrower profile and therefore do not require this
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5000-4090 390 FE Ford FX Series -5cc Flat Top FE Ford Forged Piston Set 4.090 inch bore Pin Dia.: 0.975" Comp Height: 1.775"