So i had my exhaust done a while back and had a dynomax bullet put on and dumped in front of my rear wheel just SI/SO. Well the truck came stock with a 2 inch pipe so they put a 2 inch pipe back on. I also had the rear cats deleted and it's still not as loud as i'd like it to be. If i replaced the 2 inch pipe after the dynomax bullet with 2.5 or 3 inch pipe, would it make the truck louder? Thanks in advance.

 

No.

Removing muffler would make it louder, removing cats would make it louder, more air into/out of motor would make it louder(supercharger).

If you have the front cats on still I'd try it without the muffler on it and see if that gives you the noise you like, will make it beefy and a little crackle, not sure on in cabin.

 

bigger pipe won't make it louder, but might make the sound deeper. Some people can't tell the difference...