Not sure which 1999 Ford Mustang In-Line Modules are right for you? We have over 1502 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Here's what some of our customers have said:
"I have compared my performance chip review to others I have read and have this it say. Othes said there were small performance improvemance and I agree, but the change in shift pateraneces is a small improvance the biggest gain is in gas mileage. You need to buy 91 ocaaine or better fuel but my car went for 18 city to 20 and 26 to 30 MPG. I have made some other changes to my car it has a K&N Cold Air Inatke and a Flowmaster Exhaust installed. I estamate the HP has been changed from 195HP to 245HP between all 3 instalations
in all I recomend the installing the Module
ICE" —Philip E from Holloman Afb, NM bought a Jet Performance Module for a 1999 Ford Mustang, Automatic, 3.8L V6.