OBR stainless steel pipe fits all HPI Baja's and primal dragsters. We've gone with stainless steel to prevent rust and the need for plating, powder coating etc 

This pipe was exclusively designed and dyno tuned around our engines and there is not a better performing pipe out there for an OBR engine. Also runs well on stock and ported engines by other tuners. Being racers at OBR this is performance designed exhaust. No coating or plating that will restrict power. We chose to do a stamped pipe over a coned pipe for performance reasons. Coned pipes aren't bad by any means but all of that extra welding restricts flow. 

All hardware, mounting bracket and gasket are included with the pipe and will come with everything needed to mount. When mounting the header to the exhaust port we recommend cutting down an L-shaped allen wrench