I agree with what LTDHO has said, but I was also impatient. I've got the exhaust system but no extractors. I was happy with it, didn't really notice much of a power gain but the engine seemed to rev a bit Free. But the noise is what I love! it was worth it just to get the nice note from the pipes.
I say do the pipes first, make sure they put on a cat with 2.5" flanges on both sides if you go for 2.5" pipeing. Either way the exhaust and extractors cost about the same seperately anyway if you're gonna replace the cat, so it doesn't matter which one you do first money wise.
Phat Drift Damaged
Cobalt Blue 1994 EF XR8 5 spd
Fully optioned - Sunroof, cruise, body kit
Stock as a Rock for the moment