Ok I'm post this up for a friend.... Ight my friend is selling (like new... He only had it for a couple (2) months) a JDM Tanabi hyper racing medalion full exhaust cat back exhaust system (from the header to the tip) he's not selling the header.... he's said $350 o.b.o or trade for a stock cuz he wants 2 go bak 2 stock.... Its on a civic EK.... I'm thinkin its a 2.25 inch in diameter... I'm 99.9% its 2.25.... Idk if I'll be able 2 put up pictures rite now.. But as soon as I can I'll put them up.... LMK