try Jegs.com--you can get a free catalog from them, thats where we get alot of our stuff fo rour GT and our 4 cylinder. And dont let anyone tell you a 4 cylinder isnt a 'real' mustang, we get that crap all the time. Good Luck!!
Ebay.com or your nearest wrecking yard. look for the Thunderbird Turbocoupe or SVO Mustang or even the Merkur XR4TI, they all run the 2.3 turbo engine which can make a ton of horsepower...
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, horsepower, modifications, troubleshooting, racing, and more!