well the car that my friend has that i started this post on is a 90 accord. it has 4-2-1 headers and a full exhaust with no cats. the car already throws a lil flame wich looks cool. he just wants it to be able to do it more often. my old mr2 had a cat and it use to throw out a little flame once in a while. but it was just a quick pop flame not liek a torch.