So would need something 2.75" ID?The pipe size is 2.75" The I6 of our TV's have a different sound than a V6.
It will make it go up, which is one of the reason im looking to do this rather quickly. Don't expect leaps and bounds, but a mpg or 2. Thats only if u can keep your foot out of it afterwards too(which can be the hardest part). Some people make a huge deal bout back pressure, dont even worry about it though unless ur putting 4 in pipe with no muffs or cats onwill changing any of the exhaust lose you fuel economy? Less back pressure?