alright im tryin to help out a freind who has a 94 integra ls...now he wants to upgrade his exhuast and im rather clueless when it comes to parts for an ls because i drive a gsr...but my ? is could he run a jdm itr header w/ a usdm sized itr 2.5" cat and run a custom mandrel bent 2.5" catback exhuast? and get it all to fit...im pretty sure the header bolts are all the same, but fill me in if im wrong...im tryin to get him the nicest and most cost effective 2.5" system all the way out...any other ideas are helpful!

 

that set up will work. it might just be cheaper to find a used type r exhaust, than getting some piping mandrel bent. what type of muffler is he thinking of?

 

That header will fit, sounds like you got a game plan to me. I personally like the ES muffler (many will probably flame me for this because of the noise) but its small not noticable and seems to do the job really good.

 

es ovals from maganflow rock...so nice sounding and all and very less cospicuious