Borla 60731 Mid-Pipes With S-Type Muffler Fits 21-24 F-150Exhaust Muffler and Pipe Assembly Mid Pipes With S Type Muffler Mid Pipes With S Type Muffler; Single 3 in. Inlet; Dual 3 in. Outlet; SPECIFICATIONS: 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;