Why do you want to do a stage 3? Everyone knows there are no stage 3 v-6s.
You can not find the stage 1 suspension, stage 2, or 3 suspension. Junk yards do not have the parts because they only list Saleens and Cobras. They do list Bullets, Mach 1, and Roushes. You can not go to the dealership and get the parts because you do not have a original Roush.
Most of the interior parts are not around any more. exterior parts are easy except the rims. Search Ebay or Craigslist. The Roush banner and signatures for the side windows are also hard to find.
Mustang Exhaust Tip Right, Cast Aluminum (1999-2004)
Mustang Exhaust Tip Left, Cast Aluminum (1999-2004)
If you have a99 or 04 you do not need the fender badges.
ROUSH Fender Badge
Roush Stage 3 Body Kit with Rear Wing Spoiler - Unpainted SM01-1K001-AA (99-04 GT, V6) - Free Shipping
1994-2004 Roush Mustang Rear Diecast Letter Set 0001-S002-RL
new engine,1.7 rocker arms,Pipes exhaust, shorty cats , shorty headers,under drive and overdrive pulleys,4.2 upper plenum, throttle body spacer, cold air intake, stage one clutch, shorty shifter, and tune. 8.8 in storage