30-01-2014, 01:10 PM
Welcome along, sorry to say it, but it kinda sounds like the previous owner didn't really know what they were doing. Universal back box is probably designed for a petrol, so will only be restricting your engine, and those chips aren't really worth the hassle.
Get some pics up, and maybe a project thread, and im sure you'll get more than enough help from people on here.
Get some pics up, and maybe a project thread, and im sure you'll get more than enough help from people on here.

![[Image: P1060836_zpsz3xgxt7q.jpg]](http://i1101.photobucket.com/albums/g427/wingnutz2/P1060836_zpsz3xgxt7q.jpg)