i need to know what muffler you guy are runing with you turbo setup. i have 2.5in coming off a set of longtubes. i will be taking off the longtubes need week.

i was going to come off the 3in downpipe with a 3in pipe all the way back going in a 3in magnaflow out the back with a 3 or 4in tip to one side. will this work or what are yall running?

 

Magnaflow works great, any thing that is straight through will work good for you. Stay away from Flomasters and the like and you will do just fine.

 

I just asked the same ? last week. People had some pretty good suggestions if you wanna look for the thread

 

i dont see the thread dan...... i see the one about the manafold but no muffler.

 

Ive got a 3in DP, into a 3" cutout, a long resonator, and a small IMCO muffler dumped at about the wheel well... Its all 3" all the way back. the 347 will be getting a 4" Duramax exhaust system

 

I heard that spin tech is a good one.

 

Spintech mufflers sound great but they are chambered.... I know its only a single digit Hp difference... but....

 

I would go with four inch from the start. Its almost a striaght shot, at least on a EC. I have the magnaflow flo thru diesel muffler. 4 inch.

 

I took a 3" spin tech and cut the ends off of it and welded 4 ends on it and put it at the end of my 4" diesel exhaust that the only other muffler on the system was a 30" long 4" strait though magnaflow Diesel muffler, and lost 1.5 pounds of boost and about 40-50 hp cuz if the difference in back pressure it added. It quieted down the noise I had on the highway above 70 MPH, but hurt my top end and boost a LOT. I take it off at the track.

 

so the magnaflow 3in would be bad for me? i was going to run 3in all the way back! i really wanted to run that magnaflow