These black high temperature shorty headers are designed for your classic 1966-1977 Ford Bronco with a 289 or 302 V8 engine. They provide ample clearance for most modified suspensions and are engineered to produce strong power and torque throughout the RPM range. These shorty headers have smooth mandrel-bent 1-1/2" 16-gauge primaries that connect to 2-1/2" collectors. The flanges are laser cut and are 3/8" thick to prevent warping. High-grade hardware is included as are premium laminated metal core gaskets and heavy-duty ball and socket flanges for a leak-proof installation. The collectors also feature O2 ports for EFI applications.