Got my first reading on my gas milage after new exhaust man and exhaust system replacement..Went from 12mpg to 16.7mpg....I also replaced the O2 sensor and ERG(EGR) valve. 1990 YJ with 2.5l running 32" Bridgecrap A/T's(160k Miles)...These results might not be the true mpg's cause the previous tank had a 120 mile highway trip on it but these results are a lot better then I expected...Peace <img src="/forums/images/graemlins/cheers.gif" alt="" />