so, I flogged a rig welder from work and stopped in at coby on the way home. they sold me some exhaust tube, bends, flanges, gaskets, a muffler and a mandrel bent pre formed section which goes over the diff and turns to avoid the gas tank. coby has a full bolt in system for 820$.... iv spent 370 on the bits and end up with the same thing at the end, woo.
the coby guy confirmed that my headers are made by pacesetter and that I will gain approx 15kw from the upgrade! not bad at all.
for the record- coby has folders full of before and after dyno runs for their exhausts- pretty interesting!