K&P MUFFLERS II INC 2201 Harrison Avenue, Rockford, IL 61109

"I’ve always taken my vehicles here for services and had never had a problem until i just took it in this past saturday to have my high flow o2 sensor replaced and they told me i needed brake pads and rotors afterwards. leaving the shop my brake pedal was stiff and i could barely stop (it wasn’t like that before). i took it right back and the lady up front assured me the techs didn’t do anything but replace the o2 sensor. Come to find out they disconnected the hose for the brake booster and never reconnected it, if you don’t know, that couldve been a fatal mistake. The owners seem like good people but out of my own safety i will never return to this place ever again and can recommend any other exhaust shop for repairs."

"Had a busted exhaust. It was patched up in 20 minutes by, I think, the apprentice who did a great job. Good price. Clean and organized shop. Deffinitely going back."

"Brought in my 2015 subaru sti for an exhaust leak from a custom exhaust I had installed 8 years prior. (The original install was done in a different state at a different shop, and the job was done poorly.) They not only fixed the leak by adding a flex pipe, but also fixed a heat shield issue too. While I was there, I learned they also do most mechanic work. So I had them replace my brake pads as well. All the work was completed quickly and for a fair price! I've already recommended them to my coworker for a repair, and the quote for her repair was also a great price. Also, the lobby was clean and decorated really cute. They will be my new go-to. Highly recommend!"

"True and honest business ! I was visiting and had an issue with What I thought was my muffler and Google to find a reputable business and they came up close by with great reviews. They didn’t hesitate to take me on as a walk-in and were very friendly, they diagnosed my car and were very honest that it wasn’t the muffler and even told me what it was and that I was safe to drive back to my place to get it fixed. Nowadays you don’t get this type of true honest customer service and I truly appreciate them for it. If I was local they definitely would earn my business! Thank you again for your help and amazing service"

"Extremely overpriced for exhaust modification was charged $200 after I was first quoted only $60! I had to wait about 3 hours just for them to take my car into the back for the work! After calling for 3 days straight trying to get what I wanted done! update: my exhaust has started to rattling pretty bad now I assume they did not add all of my exhaust hangers back on! the welds are pretty horrible! too so because of that I have multiple exhaust leaks I honestly wouldn’t recommend going here"