What about outside diameter? Just wondering how much space thay have for packing between the perforated tube and the outside case on the muffler

 

Where do you get a turbo back exhaust system by magnaflow. The only systems they have on their website is cat backs?!

Jake

 

My magnaflow 5 inch turbo back drones like a dog when towing. I don't have the exhaust tip, just the side exit pipe. Could this increase the noise?

 

Magnaflow muffler drops down to 4" inside the muffler, I didn't like that so I went with a Donaldson Muffler. When I called Magnaflow about their muffler stepping down to a 4" they told me that nobody needed a muffler bigger than 4" so that is why they don't make one. I said oh really? What if you have a twin turbo with a 5" exhaust outlet, why would you choke it back down with a 4" muffler? "Oh well maybe in that case" ,they said. So needless to say I was upset with my 5" system that was really a 4".

 

I went with Expandit 5" turbo back w/ their muffler. Muffler is 5" straight through. Downpipe goes from 4"-5" right at the exhaust elbow. It's loud, and a little raspy for my liking. I am planning on changing out to a Donaldson muffler for a deeper pitch.