I am doing a drivetrain swap. New 396/700r4/twinstick 205 are going into my 80 K10./forums/images/graemlins/truck.gif I am going to use hooker headers and run dual exhaust. They just started doing emissions testing around here and I want to be able to register this thing and have it pass emissions./forums/images/graemlins/deal.gif My questions are: 1) Should I install a catalytic converter? 2) Should I make a Y pipe and use 1 high flow cat or do a regular dual exhaust and use 2 cats? 3) If I install 2 cats should they go before or after the crossover? I have heard that a crossover can help with low end torque and reduce noise. But where should the cats be in relation to header collectors and the crossover? I am thinking that if I use 2 cats and a crossover I won't need mufflers. If I do I will be able to add them later. As cool as FLOWMASTERs are, I don't need to be a member of that club($50/muffler). What do you people think? Oh yeah, I would go to a muffleer shop and have a system bent up, but a friend with a similiar truck just spent $600 for dual exhaust with 1 cat and 2 flowmasters from his headers. His system sounds good but hangs almost as low as his axles and looks like it was designed and welded by retarded baboons(nothing against baboons)!!! /forums/images/graemlins/ignore.gif Any input is appreciated!!!