2006 300c srt8 - best after market cat back

[vmitran93]

U7135. 2006 300srt8. What is the best aftermarket exhaust for the U7135 for an '06 300 srt8? On a straight thru system, will a slightly smaller diameter be better for horsepower gain?

[Mike_Levy]

Theres almost no gain with any of the catbacks. The stock one isn't restrictive. The headers and catpipes are the restriction on the LX SRT8s exhaust.

[DGatzby1]

Mike's right, and don't go with a smaller exhaust on a 6.1L, there is no gain or point to that.

[Quick]

Mopar/Corsa
Going to a 3" does not help either. (stock is 2.75)

[brandy16]

Corsa is the best. I saw horsepower TV did a show on the cosa and you will get gains from this exhaust. I cant remember how much but you can go to horsepower TV and check it out.