Yes, as I shop around / save for APS, I will keep the stock catback. Married, I bought this pipe off a friend in upstate NY. Oh, and it shouldnt be too smelly, considering I am leaving the stock catback on.
3.5" and tapers to 3", which continues through the rest of the pipe. Here are the basic downpipe types:
Please keep us posted on the install and any issues.. I'm getting my Helix DP next week so any install commentary will be welcome1
I am not familiar with a STi's exhaust but is this both the down-pipe and the mid-section in one piece? Maybe that is why it looks different in the picture. It’s so long that the diameter appears small. What size is your rear section? Just curious on the match up, gaskets and such. A PITA on my car.
I have a Random dp that is catless and then their cat mid section. Two short pieces. Similiar to these. http://xcceleration.com/itemdetails.cfm83.htm I see nothing wrong with it being all one piece at all however. Less gaskets to blow.