Currently looking at getting the Powerlab single turbo kit but already have a problem because about a year ago I had a custom built true duel exhaust put in. I know that it would be better to get a twin turbo for that but I like the single. I've heard that I need a reverse y-pipe for that application but 1st of all I don't know how to get one of those. And second how much of a problem is it going to be if the downpipe from the kit is bigger than the pipes for my exhaust? Say an inch bigger?

 

Take it to the person who did your custom exhaust and have them match it up. It's pretty simple. Just create a Y connection.

The comment about should have gotten a twin turbo setup since you have a dual exhaust is kind of strange.....you buy the turbo kit you want and modify the simple things like an exhaust system around it.

 

I’m running the HKS dual exhaust on my coupe; I had Intense fabricate a reverse y-pipe for me a few years ago… real simple piece, any shop should be able to do it for you.