Bolt-on horsepower and torque with these short-tube headers by Drake. These headers are designed to fit 66-77 Broncos with 289/302 motors with ample clearance for most modified suspensions. They are engineered to make strong power and torque throughout the RPM range with smooth mandrel-bent 1-1/2" primaries and 2.5" collectors. Each header is manufactured with heavy-duty features like extra-thick 3/8" laser cut flanges to guard against warping and heavy-wall 16 ga tubing for maximum durability. They are finished in a durable high-temp black paint. This header system includes high quality hardware, premium laminated metal core gaskets and heavy duty ball and socket flanges for a leak proof installation. Also includes "O2 Ports in Collectors for EFI conversion.