89253 Doug Thorley Y pipe 2003-2004 4Runner & GX470 4.7L V8

This Y pipe from Doug Thorley replaces the stock Y pipe with an easy bolt in installation. Bolts to the rear of the front cats and to the stock or aftermarket cat-back exhaust.

The Y pipe is made from 409 grade stainless steel.  The resonator portion is aluminized steel.  The driver’s side flange that bolts to the front cat/header will require welding in place to account for the production variations of the vehicle.