ok i want to make a custom exhaust for my car and i want it to backfire i was wondering what is the best way to do this and should i take out the presilencer and cat? i want to leave it duel also any advice would be helpfull thank you also if i take out the cat and presilencer and have striaght pipes to a y pipe to 2 duel mufflers will i have back pressure problems?

 

dude all i have is the RB downpipe, and presilencer and some magnaflow mufflers and i get some back fire when i shift at high rpms

 

same here (only i have the RB cat-back to match)