Exhaust is up next, I have a set of new SD headers, down pipe and some sweet dual tip stainless mufflers to install. i am just waiting for the pipes in-between and resonator to get it all on.
going with these guys in 2.5" stainless http://www.mandrelexhaustsystems.com/products/97-03-pontiac-grand-prix-dual-exhaust-tubing-system.html
and the red hots glass pack from summit for the resonator http://www.summitracing.com/parts/big-50252flt/overview/