Borla 60722 Exhaust Pipe Adapter Fits 21-23 MustangExhaust Pipe Adapter Exhaust Pipe Adapter; For Use w PN[140837 140837BC 140837CF]; SPECIFICATIONS: Diameter (in.): OEM Material: N A Style: OEM WARNING CA Proposition 65: Yes WARNING CA Proposition 65 Message: WARNING: This product in the physical form it is sold does not present a hazard. However; operations including; but not limited to welding; brazing; or thermal cutting can expose you to chemicals including Chromium; Nickel; Cobalt; Arsenic;