
Ford 442
5066-4050 442 FE Ford FX Series -24cc Dish Top FE Ford Forged Piston Set 4.050 inch bore Pin Dia.: 0.99" Comp Height: 1.39"
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425 FE Ford, FX, Comp Height: 1.39, -24cc Dish Top, PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.125", ROD: 6.7, Approx Comp Ratio: 65cc-9.93, 72cc-9.34, 76cc-9.02 NOTE: Effective July 3, 2025, all FE Ford 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.
5066-4080 442 FE Ford FX Series -24cc Dish Top FE Ford Forged Piston Set 4.080 inch bore Pin Dia.: 0.99" Comp Height: 1.39"
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431 FE Ford, FX, Comp Height: 1.39, -24cc Dish Top, PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.125", ROD: 6.7, Approx Comp Ratio: 65cc-10.05, 72cc-9.44, 76cc-9.14 NOTE: Effective July 3, 2025, all FE Ford 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.
5066-4090 442 FE Ford FX Series -24cc Dish Top FE Ford Forged Piston Set 4.090 inch bore Pin Dia.: 0.99" Comp Height: 1.39"
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434 FE Ford, FX, Comp Height: 1.39, -24cc Dish Top, PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.125", ROD: 6.7, Approx Comp Ratio: 65cc-10.1, 72cc-9.5, 76cc-9.18 NOTE: Effective July 3, 2025, all FE Ford 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.
5066-4110 442 FE Ford FX Series -24cc Dish Top FE Ford Forged Piston Set 4.110 inch bore Pin Dia.: 0.99" Comp Height: 1.39"
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438 FE Ford, FX, Comp Height: 1.39, -24cc Dish Top, PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.125", ROD: 6.7, Approx Comp Ratio: 65cc-10.19, 72cc-9.57, 76cc-9.26 NOTE: Effective July 3, 2025, all FE Ford 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.
5066-4130 442 FE Ford FX Series -24cc Dish Top FE Ford Forged Piston Set 4.130 inch bore Pin Dia.: 0.99" Comp Height: 1.39"
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442 FE Ford, FX, Comp Height: 1.39, -24cc Dish Top, PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.125", ROD: 6.7, Approx Comp Ratio: 65cc-10.25, 72cc-9.65, 76cc-9.32 NOTE: Effective July 3, 2025, all FE Ford 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.
5066-4160 442 FE Ford FX Series -24cc Dish Top FE Ford Forged Piston Set 4.160 inch bore Pin Dia.: 0.99" Comp Height: 1.39"
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449 FE Ford, FX, Comp Height: 1.39, -24cc Dish Top, PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.125", ROD: 6.7, Approx Comp Ratio: 65cc-10.4, 72cc-9.77, 76cc-9.44 NOTE: Effective July 3, 2025, all FE Ford 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.
5066-4170 442 FE Ford FX Series -24cc Dish Top FE Ford Forged Piston Set 4.170 inch bore Pin Dia.: 0.99" Comp Height: 1.39"
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451 FE Ford, FX, Comp Height: 1.39, -24cc Dish Top, PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.125", ROD: 6.7, Approx Comp Ratio: 65cc-10.43, 72cc-9.81, 76cc-9.48 NOTE: Effective July 3, 2025, all FE Ford 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.
5066-4190 442 FE Ford FX Series -24cc Dish Top FE Ford Forged Piston Set 4.190 inch bore Pin Dia.: 0.99" Comp Height: 1.39"
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455 FE Ford, FX, Comp Height: 1.39, -24cc Dish Top, PIN: .99", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 4.125", ROD: 6.7, Approx Comp Ratio: 65cc-10.51, 72cc-9.87, 76cc-9.55 NOTE: Effective July 3, 2025, all FE Ford 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.
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