RE: Exhaust System, Increase in MPG?
I don't know, I have always bought performance parts ignoring the MPGs crap. I buy performance parts because I want more horsepower. If I can get some extra MPGs while I'm driving around slowly, then that is a bonus, but I wouldn't advise anybody to buy with the sole purpose of gaining miles per gallon. Honestly, a lot of these mods are just minimal. It is until you start digging into the motor and changing the camshaft, fuel injectors, valvetrain etc, that is when the "bolt on modifications" will become even more useful. But for the average person like me, I buy the performance parts for pleasure. I did the exhaust system for the looks and the sound, period. I got the longtube headers for torque and highend. I bought my K&N intake kit because I wanted more air being pushed through the engine to utilize the headers and exhaust. MPGs really are never part of the equation to me. I keep my expectations low, and then I will find myself happy when I gain a MPG because I drove cautiously all day. Bottom line, buy performance parts for the performance aspect of things, otherwise you may be dissapointed. If you want better MPGs, abide by maintainance first. Oil changes with new oil filters, new spark plugs and wires etc. A vehicle can only warp it's stock mpg expectations so much. However, on the other hand, you can defiantly add more horsepower to a vehicle than what it was at stock, but it isn't going to get you better MPGs because you will be using it after all that hard earned money.