would this increase the gas milage of my 1993 gmc truck? What are the benefits of a new exhaust system?
Better sound some more power perhaps a little better gas mileage prob wouldn't be noticeable
if you go with a flow master muffler and bigger pipes this will increase your torque in the lower power range, meaning it wont take so much for you to start moving, but, everytime you hit the gas to hear the sound as everybody does, you waste gas. any thing you would gain from the exhaust you will loose from reving up the engine or getting into it to hear the pipes, as the gains are very minimal. if i were to try to get better gas milage, make sure it is properly running, change your fuel filter an o2 sensors, make sure the tires are properly inflated, have the drive line lubed, check your alignment, get a kn airfilter, and the flowmaster muffler with bigger pipes, and check the coolant make sure it doesnt need to be changed. all this eems like alot, but its what we do in are shop and it seems to be the most effective in the long run. we also do a fuel injection cleaner that is another step in the service. justice brothers makes a good product for that. it will cost you a little bitof money to do this kind of service, and you will get a mpg increase, but its gonna take a long time for you to recoup any of that money. no matter what you do it will take you time to get taht money back, but with this type of service, it will last longer and get bigger gains, so it wont take as long as some smaller changes
I have used Gibson and Magnaflow cat back on a late model GMC Pu and saw no difference in mileage on either one. They both were louder if that's all your looking for but I wouldn't do it again . Was not worth the money for either one. You can buy alot of gas for the $450. I spent on each system. They both claim big things but I didn't see it.
