When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I just purchased My first mustang it is a 1990 mustang gt 5.0 5spd 127k. Let me know what the first performance modifications should be. It already has a full exhaust setup so let me know. Ohh and also it grinds sometimes going into reverse. I am new to mustangs but not to tuning cars in general.