Finding a mechanic who cares as much about my 7.3 liter as I do is not easy thing. Cory has been great to work with, takes pride in what he does and offers a reasonable price. I highly recommend him and Im thoroughly impressed.

WOW! Another place that can take a truck and lift it, tune it, and make it look and sound like 90% of all the other trucks in this hick town! The lack of creativity in this town is amazing! But what do expect from a town full of country hillbilly retards? Good work guys!

Ive taken all of my 6 trucks to Cory. He knows eveything about them and can actually diagnose the problems without throwing parts at it like most shops in town. Good quality honest work! Theres a reason hes the Ford Guru!!!

Cory at Grand Valley performance came highly recommended by two very reputable people that I know. He did an excellent job on my truck and had me back up in less than a day. His rates and quality of work are unmatched by anyone else in the valley.

Corey runs an awesome team of guys and has more knowledge about diesel trucks then anyone else in town. I was very happily surprised with his quick knowledge and the way he took care of me while fixing up my new power stroke.

Cory built me a fantastic 6-0 and worked with me for several months to make sure I got exactly what I was looking for. He continues to do great work and I’d recommend him to anyone looking for a trustworthy mechanic.

Okay now knowing whats going on and there are new owners at Grand valley performance and both mechanics are still there Im just glad that the mechanics are still there reliable responsible and respectable mad respect to you Mike keep up the good!!!

I finally found a mechanic that is trustworthy, stands by his work, provides excellent customer service, and offers expedient repairs while maintaining the highest quality of workmanship. Cory and his crew are the only mechanics that I will ever take my truck to.

Nice guy did a great job very timely as promised! Definitely recommended!

Piss poor customer service. Ive called 3 times and left messages about an issue weve been having on a truck these guys put an engine in.Ignoring your customers is Not a good way to get returning customers.

Amazing service !!! Attention to detail these guys are great

Have been using Cory since I got my power stroke. Hes the only one I will let put hands on my 6.0 He treats her right