High performance modification service near Chicago, IL

The are the most professional, reliable and honest people in town. I my many years of dealing with different mechanics and tradesmen alike not one even comes close. Matt and the rest of the staff are friendly, caring and most importantly honest in meeting your needs without overselling or over inflating their prices. I would definitely recommend them over any other people have dealt with. Amir Mesri

What an amazing experience! I was greeted by the lovely owner, Debbie, and her little assistant. Debbie is so sweet, she made me very comfortable and I left the business knowing that I will return here with confidence. My service was fast and at a great price! My light is finally working like it should and I'm very grateful to Jose for doing such a great job. I'm recommending this business to all my friends.

I have high expectations for anyone who works on my vehicles and Rennology was up to the task. They are very professional and completed the work in a timely manner.

I took my ML 350 due to a problem with the Engine. The drive chain had broken. The dealer's recommendation was to repair and cost was something of buying another car! So, I took to Dupage Auto Werks. The recommendation is to replace the 118K miles engine with a much lower engine. They shopped and found a fimilar engine and practically did a 'Engine Transplantation'! Now that I have an engine not only has a lower mileage, but also was cheaper overall. Very satisfied with them to have suggested and able to get my car worth somehting that I can keep it a much longer time!