Damn, I thought you meant after the turbo as well. Before the mullfer could work if it was a chambered design but like Chris said, I would be worried about pieces of the muffler/slag whatever getting into the turbo.

One thing I noticed with my magnaflow was that with it on, the part throttle boost response seemed better than with the muffler off. The top end charge seemed a bit better with the muffler off but overall it really didn't feel much different at WOT. I just took it off at the track because it sounded cool. LOL

 

just throw a tail pipe on it so it looks like a stock one...it will quiet it down a bunch....

 

The tailpipe is like the stock one already, I'll look for some sort of straight through muffler.

 

hey scott..my old truck was exactly like yours...upgrade to the gt67 as soon as you can...what a diffrence!!!!!

 

I put a 14" Flo-Pro 2.5" Dual in/2.5" Single out before my turbo. I was going to put a larger magnaflow but it would have meant removing the cats which I thought might make it even louder. I did the Flo-Pro because it was what the shop I used carried and a lot cheaper than a similar Magnaflow. The Flo-Pro is a chambered design with no interior packing of any sort and I was a little worried about harming performance. I took it out and ran it on the G-Tech and gained .17 on the run from 14.368 to 14.198. I cannot notice any difference in performance and the G-Tech says it is faster.

The truck is almost to stock sound levels. Well it is louder than stock and sounds very good in my opinion. I has a nice deep rumble to it which is not noticable inside and you can barely hear it at cruise with the stereo off. I like it.

Might even be too quiet for a lot of people.

 

What was the overall length of your muffler and do you know the part number? I was also looking at one of these Spintech

 

Thats what I'm going to do. My exhaust now just dumps after the rear-end, how much quiter does it make it?

 

Here is another idea Resonator. After the turbo.

 

it made it quiet enough that i had to add a electric cutout so i could open it to hear it good...

 

The Flo-Pro I used was a FP 727 and it is 20" long overall. I have heard good things about spintech as well.