Shaw 604 Crate Headers

Shaw 604 Crate Long Primary Design Headers. Fits 2019 And Newer Shaw, Ruhlman, Billsbuilt, Impressive, GRT. Longer Primaries For Maximum Torque And Horsepower. 1-5/8" - 1-3/4" - 1-7/8" Tube Diameter. 3" Collector Diameter. Chevy 604 Crate Engine. Gaskets Included. **This Product May Not Be Legal For Street Use On Emissions-Controlled Vehicles But May Be Legal For Use On Dedicated Competition Or Pre-Pollution-Controlled Vehicles Only**