VW Baja, Buggy, Rail or Rod Black 1 1/2 Inch Off Road Large Flange Stinger Header Exhaust Systems. 1 1/2" Tubing with Large Flange. With interchangeable components, the black stinger, u bend, super trap and maybe a muffler. The with heater header is for use with heater boxes or j tubes and has connections for heat risers if needed. The no heater header eliminates heater boxes and heat riser connections. When using the muffler a u-bend attachment is also needed. Fits 1200 - 1600cc upright motors. Includes gaskets. Donut clamp kit sold separately.