jus t got the 4in diesel exhaust done,, what a pain in the ,,, getting the 3in to 4in y connected to the 4in system, the Y and the 4in pipe are the same size, where you cut the piping on the 4in system, so you need the 4in y bumped up at an exhaust shop to slide over 4in piping, will make your life easier, no one has mentioned that, all the brackets ect went on great, i used a donaldson 4in bus muffler that is 4ft long, nice tone at idle, really quiet in cab at freeway speeds, can hear exhaust when you run it hard, truck accelerates much better, less throttle to maintain 75 mph, cant wait to tow with it, i had dual 3in with cats and dual 3in mandrel bends after cats with flowmaster 40's was loud, in cab, ect,,, i didnt install cats as of now, exhaust smells fine,
i really like this whole system,, factory exhaust manifolds also, soon will be a 0411 swap and a tune
i really like this whole system,, factory exhaust manifolds also, soon will be a 0411 swap and a tune