I have a 94 celica with the Burien Turbo Kit. i want to push more boost and get the interal rebuilt. any idea where i can get some parts. piston, rods, rings, etc.... i have no idea what size i would be needed.

I've seen rods on nopionline.com and horsepowerfreaks.com, I haven't seen pistons or rings, but according to the parts database there are a few companies that make them. and the stock headgasket for a 98+ 5sfe is metal, and I've also seen metal a metal headgasket on horsepowerfreaks.com and atsracing.com that's all I know.