InstallsCOBB 3″ Catback Exhaust Sound Check feat. BOV Noises! ChrisTouge March 14, 2016 No Comments This 04′ WRX came in for a bit more rumble, we replaced the stock catback exhaust system with the COBB 3″ catback. The COBB exhaust has a noticeably clearer and deeper note compared to stock.Fully Built 2011 WRX + GTX3076R + Race Gas – Dyno NumbersRocknSTi’s 390WHP Rotated GTX3076R Turbo 2013 STi 00Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Message *Name * Email Address * Website ΔThis site uses Akismet to reduce spam. Learn how your comment data is processed.