Thanks people for all the responses on the LHT and Secretservices post.

I own a 94 Prelude and have looked far and wide for a true catback system with piping diameter bigger than 60mm. I have come to the conclusion that there isn't one out there.

I purchased a couple months ago, a Greddy EVO 2 system. I checked on there site and for the piping it says 60-70mm si I thought finally. When I ordered it, I told the guy I wanted the 70mm version. He said OK. Yeah, will I found out this guy was an idiot when I received the system. The piping is 60mm until you get to the small portion before you get to the canister where it becomes 70mm. Well that sucks for me.

So I am looking for a shop that does mandrel bends to make me an exact copy of my piping from my greddy but with a bigger diameter. I am pretty sure someone out there has had to get custom piping for there car so post it up here for me. Please.