aaah okay aaronng, appreciate the help.. does having coilovers and the car lowered have any affect on the fuel consumption and why the gauge may be winding down alot quicker? because the reason why i was jacking the rear of my car up in the first place was because of the coilover install. i was just thinkin about it then and thought id ask you. so what does the diffuser do? im gonna have to jack the rear to see the diffuser as the car is low now.