What is the Difference?

I know I'm new and all but with the catback aren't the welds really clean and smooth? I've been debating on going the custom route and it just seems more logical to go that route...


I am also wondering this

And I have a greddy dual dtm muffler...it sounds hella aggresive so aggresive cops...wanna gimme tickets :( dang them

Anyways, I have the original piping only because I'm replacing motor and don't wanna change piping till I get the new motor


a 2.5" would be best for a naturally aspirated car
a 3" would be best for a turbo'd car

least my .02 cents

OH something I forgot..

If you are going to have a lot of power you will either need to get a flex pipe welding on the piping (unless u have a lude and have one already) or get rubber hangers...either way it works