I installed my own five inch stacks on my 93'. I spent $140 per 4ft bullhauler, $90 for 5 inch Y, $26 for each short radious 90'(3), $30 for flex, and around $80 for clamps and a short piece of 5 inch pipe. I love the way my truck sounds going down the road and it is real cool to dump smoke on the car behind me. If you do install a stack kit make sure you get the short radious 90's. If you want a kit built you can call or email me.