I have an Alpawerks header, ZPI S-pipe, Injen SES exhaust. I am about to buy the ZPI Midpipe. My question is for anyone that has used a Magnaflow muffler/resonator, I read a few topics they used a 30" but the ones I have found that long are 3" inlet and outlen. What is the size of our stock resonator outside body size? I am looking for a 2.5" Inlet/Outlet. Anyone with experiance on this would help here are the links to the ones I am looking at. Thanks for the comments. The one I am leaning more towards is the XL 3 chamber.

7" round XL part number 13741 but the inlet and outlet are too big
do you think I might be able to get away with the 6" offset XL 13646?

http://www.magnaflow.com/02product/s...ne=main&id=303

6" or 7" round do you thinks the 7" round would fit?
http://www.magnaflow.com/02product/s...ne=main&id=303

or

http://www.flowmastermufflers.com/pr...oducts_id=2646


The point of this is to make my exhaust quieter witht the Alphawerks header, S-pipe, and Injen SES. Thanks for any advice. I am definately getting the ZPI Midpipe this week but neet to decide which muffler resonator to use.

 

First, you will have a hard time getting an oval muffler under there. You would be better off with a 4" or 6" straight through round muffler. I used 4" but there should be room for 6" under there. I think the stock resonator is 6".

Second, you'd be better off if you replaced the stock second cat with part# 14416 or 14616.

 

Thats what I am talking about the round mufflers not oval look at the links

 

Your not going to be able to make any of those work imho. I would put your car up and measure. You'd be better off with 2 4" round resonators. 7" is the same size as my Megan muffler and there is no way that would fit under the car.