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Wheels up Fox body Mustang with DSS Racing power.

Ford

STEP 6: Top - Comp. Ratio Show all STEP 6: Top - Comp. Ratio
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434 FE Ford, FX, Comp Height: 1.39, -5cc Flat 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-12.3, 72cc-11.39, 76cc-10.92 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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431 FE Ford, FX, Comp Height: 1.39, -5cc Flat 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-12.25, 72cc-11.32, 76cc-10.85 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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425 FE Ford, FX, Comp Height: 1.39, -5cc Flat 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-12.09, 72cc-11.2, 76cc-10.73 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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439 FE Ford, FX, Comp Height: 1.674, -20cc Dish Top, PIN: .975", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.984", ROD: 6.489, Approx Comp Ratio: 65cc-10.56, 72cc-9.89, 76cc-9.56 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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435 FE Ford, FX, Comp Height: 1.674, -20cc Dish Top, PIN: .975", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.984", ROD: 6.489, Approx Comp Ratio: 65cc-10.49, 72cc-9.83, 76cc-9.5 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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433 FE Ford, FX, Comp Height: 1.674, -20cc Dish Top, PIN: .975", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.984", ROD: 6.489, Approx Comp Ratio: 65cc-10.45, 72cc-9.79, 76cc-9.46 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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427 FE Ford, FX, Comp Height: 1.674, -20cc Dish Top, PIN: .975", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.984", ROD: 6.489, Approx Comp Ratio: 65cc-10.33, 72cc-9.68, 76cc-9.35 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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423 FE Ford, FX, Comp Height: 1.674, -20cc Dish Top, PIN: .975", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.984", ROD: 6.489, Approx Comp Ratio: 65cc-10.24, 72cc-9.61, 76cc-9.27 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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419 FE Ford, FX, Comp Height: 1.674, -20cc Dish Top, PIN: .975", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.984", ROD: 6.489, Approx Comp Ratio: 65cc-10.17, 72cc-9.53, 76cc-9.21 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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417 FE Ford, FX, Comp Height: 1.674, -20cc Dish Top, PIN: .975", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.984", ROD: 6.489, Approx Comp Ratio: 65cc-10.13, 72cc-9.49, 76cc-9.17 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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411 FE Ford, FX, Comp Height: 1.674, -20cc Dish Top, PIN: .975", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.984", ROD: 6.489, Approx Comp Ratio: 65cc-10.01, 72cc-9.38, 76cc-9.07 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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439 FE Ford, FX, Comp Height: 1.674, -10cc Dish Top, PIN: .975", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.984", ROD: 6.489, Approx Comp Ratio: 65cc-11.7, 72cc-10.87, 76cc-10.46 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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435 FE Ford, FX, Comp Height: 1.674, -10cc Dish Top, PIN: .975", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.984", ROD: 6.489, Approx Comp Ratio: 65cc-11.62, 72cc-10.8, 76cc-10.39 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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433 FE Ford, FX, Comp Height: 1.674, -10cc Dish Top, PIN: .975", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.984", ROD: 6.489, Approx Comp Ratio: 65cc-11.57, 72cc-10.75, 76cc-10.35 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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427 FE Ford, FX, Comp Height: 1.674, -10cc Dish Top, PIN: .975", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.984", ROD: 6.489, Approx Comp Ratio: 65cc-11.45, 72cc-10.63, 76cc-10.23 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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423 FE Ford, FX, Comp Height: 1.674, -10cc Dish Top, PIN: .975", Full-Floating or Press Fit, Ring Groove: 1.2/1.2/3MM, Stroke: 3.984", ROD: 6.489, Approx Comp Ratio: 65cc-11.35, 72cc-10.56, 76cc-10.15 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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