Hey, I just got the Aero-T muffler installed Saturday 4/3/04, also I installed the Tornadofuelsaver in the air inlet hose. Drove it home approximately 450 miles. I noticed a significant mileage increase, Love the low end grunt, especially from 0-80mph. Interior sound level not as bad as I expected. According to the installers it will decrease at about 1500 miles...$200 well spent. Hey when will be taken off the NOOBEE list???