does any1 know how to fab up a 3inch dump pipe or steer me in right direction for 2.8gu,,, got a mate who is a fabricator and has a 9second vl commodore whos done all of his own work on his car so i thought it would be a good idea if he could fab me up exhaust system for my 4b he had a quick look at my 4b and said couldnt be done,,, i laughed at him and told him every man and his dog is doin this 3 inch dump pipe,,, obviously he hasnt worked on a patrol... i really want him to do it cause it will be so cheap for me...