Not sure which 2004 Jeep Grand Cherokee 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:
"At first i was looking to hard to notice a difference. Then i noticed how well the gas mileage was doing and when i stomped on the pedal there was no more hesitation! For the price it was a good buy, especially how gas prices are. Thanks JET!" —Matthew M from Tualatin, OR bought a Jet Performance Module for a 2004 Jeep Grand Cherokee.