I had taken my car to another shop for failing the state emission test. After spending over $400 on an EGR valve, the problem still wasn't fixed and the check engine lamp was on. It failed the emission test again. So I saw tuffys name liosted in the Illinois epa directory so I took my car to them for the repair. As it turns out, all that really needed to be done was to clean out the passage tube in the intake for the egr valve, but that's not why I'm writing this review. The guys at Tuffy went above and beyond what ANY shop would do and not only repaired the problem, but took the car to the emission test station and had the test passed for me! I was so ecstatically happy I had to write this review! The moral of the story is, they were very nice to deal with, thoroughly explained what was wrong with my car, and fixed it right the first time! THANK YOU TUFFY!