They are 11 gauge stainless steel tube (ss) with 1/2" mild steel (ms) flanges and come as a pair. 2 1/4" outlets for t-6 pedestal applications. They are the best flowing stuff we have and can be turned around to face forward. These are intended for HIGHLY MODIFIED MOTORS ONLY!!!
These are custom made to order so expect 1-2 weeks build time. Comes with OEM style up pipe flanges welded on unless specified.