Mass-Flo EFI
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The primary and secondary throttle shafts ride on sealed roller bearings rather than cheap bushings to prevent vacuum (and pressure) leaks that can raise havoc with the air/fuel ratio. The seals also prevent the entry of unfiltered air. Note the stock Ford throttle position sensor (TPS). Quality Roadsters pre-adjusts the TPS prior to shipping so you don't have to. View Related Article
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