After having this 07 RT "track pack" for a few years and keeping it fairly stock. Well all stock. Stupid force chip.and a drop.in k&n I'd like to get Kore power out of it for cheapest. I was thinking a tune used intake and used exhaust. Are there any places that sell used performance parts? I'm on a fairly decent budget. I'm building my 85 Mustang GT to be the "weekend warrior" but it would be nice to take on a newer Mustang and win maybe? Or if there's any tips n tricks to these machines to help out the performance feel free to tell me so! Haha I appreciate it in advance!