Rep Power: 786

im going to get the american Thunder cat back, and i wanted to know what muffler to get and what they do thats diffrent. the 5x10 crossflow or the 80 series?????? whats the diff which one will give me more pwer?

 
Rep Power: 797

i thought the american thunder came with its own muffler, check flowmastermufflers.com

 
Rep Power: 967

yeah a catback is everything from the catalytic converter to the rear, so piping, muffler, and tips.

 
Rep Power: 1046

 
Rep Power: 959

X2

 
Rep Power: 1126

yep all but cat

 
Rep Power: 786

well which muffler is better, there is 2 cat backs and i dont know which one to get the crossflow series or the 80 series muffler and 2.5 or 3 inch there is a lil diffrence in the price but im willing to pay if its better

 
Rep Power: 0

3 inch cat back

 
Rep Power: 829

 
Rep Power: 1126

2.5 3 inch may be too big to get the scavenging effect (maybe call the company and ask they may be able to tell which will be best) my drag car ran faster with smaller exhaust