Auto Tail Exhaust Pipe Expander 3 Pcs 1-1/8" to 3-1/2" Drop Forged With Heat Treated Steel Designed Quickly & Easily Straighten Out Clamp Dent in Mufflers & Tailpipes A Simple Wrench Turn Expands Pipe for Exhaust System Repair & Installation Works With All 1-1/8" to 3-1/2"ID. Thin Wall Pipes