This BluePrint Engines 157-tooth SFI flexplate is engineered as the perfect match for Ford Windsor, based crate engines requiring a 28 oz external balance. Designed to pair seamlessly with C4 automatic transmissions, it delivers smooth engagement, dependable performance, and the strength you expect when backing a crate engine with proven drivetrain components. Built from high-quality steel and SFI 29.1 certified, this flexplate provides peace of mind whether you’re finishing a classic restoration or putting together a reliable street performance build.