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The Stainless Works 3‑1/2" rod‑builder exhaust butt weld kit includes CNC mandrel‑bent 304 stainless tubing sized for high‑flow applications. Tubing is 3‑1/2" diameter with a .065" wall and the kit contains four 4' straight tubes plus four each of 45°, 90° and 180° bends; no expanded ends are supplied. The maker recommends 308L stainless welding rod and the kit is made in the USA.
Stainless Works 3 1/2in Rod Builder Exhaust (Butt Weld Kit)
