The Stainless Works 2‑1/4" rod‑builder slip‑fit kit supplies CNC mandrel‑bent 304 stainless tubing with one expanded end on each tube for slip connections. Tubing is 2‑1/4" diameter with a .049" wall and the kit includes four 4' straight tubes plus four each of 45°, 90° and 180° bends. 308L stainless welding rod is recommended; the kit is produced in the USA.
Stainless Works 2 1/4in Rod Builder Exhaust (Slip Fit Kit)