This flex tube by Jones Exhaust is designed to minimize cracked manifolds or headers. Features a T304 stainless steel 2-ply bellow flexible joint with corrugated inner tubing encased in a T304 braided cover. Its flex pipe is constructed from aluminized steel. Its flex joint is constructed from stainless steel. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.