Originally posted by kfar09
i have a greddy evo and dc sports type r 4-1 header and was also wondering what size would be best? and would it change the sound? also what is a good price to pay and where? dont mean to jack your thread, i still want to know what size would be best... i think its 2.5 but im not sure
if you have a jdm dc header then you'll need a 2.5 cat and 2.5 exhaust so you're not choking the system.