Stainless Works 3 1/2in Rod Builder Exhaust (Slip Fit Kit)

If you're fabricating a custom exhaust system, this Rod Builder Exhaust Kit from Stainless Works is a solid starting point. It gives you the core components to start shaping your own exhaust routing, whether you're working on a classic hot rod, a custom truck, or something else entirely. The kit focuses on providing high-quality materials and precise bends so you can focus on the welding and final fitment.

Everything in this kit is made from 304 stainless steel, which is known for its excellent corrosion resistance, making it a great choice for exhaust components that are exposed to the elements. The tubing measures 3-1/2 inches in diameter with a .065 wall thickness, and all the bends are CNC mandrel bent. This means the bends maintain their shape and diameter throughout the curve, which is crucial for optimal exhaust flow and preventing turbulence. You get four 4-foot straight sections, four 45-degree bends, four 90-degree bends, and four 180-degree bends. Each tube also has one expanded end, which helps with slip-fit connections during assembly.

This kit is proudly made in the USA. While it's designed for custom fabrication, remember that it's not CARB approved and cannot be shipped to California. You'll want to have 308L SS welding rod on hand for assembly, and it's always a good idea to refer to manufacturer instructions for the best welding practices.