I am planning to make a custom exhaust

and I wanna make it true dual using magnaflow's muffler(11385) which is

dual in/out (2.25in).

The question is I could found the muffler on the website, but where do I get

2.25 inch piping from??


Should i just buy this muffler and bring it to any custom exhaust shops?

 

If you aren't actually welding up the system yourself, you can just ask the shop to provide you with whatever size pipe you want. I'd prefer mandrel bent and SS if you can afford it. But non-SS is probably okay for your area. If you are making a true dual, then I'd definately use two of the above and use one of them as a resonated X pipe right after each cat.

 

Hey Jeff...question...wrong thread but I've read a few of your other exhaust posts...I have all breather mods plus cams.and springs w tune...i have a 2.5 td ingen...am I better off with this setup or a single 3" pipe with hr y pipe and OEM style muffler.

 

Just in my opinion only. Hydrazine really likes his Y pipe design coupled to a pretty big arsed pipe coming out of his merge collector. I think he makes a 3" single exhaust. but he's careful to make sure his Y pipe design maintains as much torque/hp as possible.
I know the Motordyne stuff really flows. How much better than a HR Y and Ingen, I don't know. But the motordyne stuff is probably the best out there. Not cheap though