Bill at Mountain High Performance goes above and beyond in his professionalism. He went out of his way to help us out. I would highly recommend them to everyone. Thanks again Bill.

Bill is a great guy helped me out big time getting my heads done so I can get back home great guy would recommend his place for all your automotive machining needs.

Brought in my Honda engine to this machine shop about a year ago and have had problems with the work they did ever since. Cylinders were never measured and if they had been they would have clearly seen that it needed to be bored over instead a basic hone job. With that basic hone job they used a rougher grit then is specifically needed for the job. Time wise it took longer than they had said. Talking to Bill the owner was like pulling teeth, you have to fight just to get a word in and pretty much everything is an argument. Everything you say is wrong and everything he says is right... god does this guy like to hear himself talk. Will not be bringing any more work your way.

Got my job done when he said he would, and charged me less than he quoted me. Really did a great job.

I use MT high to repair all are cyl heads on the Cummins ISLG natural gas engines in our fleet. If your running natural gas you know the issues. They are very fast and help me get my truck back up and running and are always priced right for the quality that they provide.

I strongly recommend Mountain High for your machine work! I have been using them for several years now for engine machine work and they always deliver excellent quality!

I havent bought anything from them. But Bill really educated me on O ringing and Fire ringing. Im not even in his home state. Was on the phone for 30 mins learning!! Awesome customer service. Wish we had a shop like his in southern California. Thanks Bill!

Bill always does great work

Very well educated guys talked with them for awhile about my build and power expectations and got alot of helpful advice!

Big thanks to Bill at Mountain High Performance always does quality machine work, always charges a fair price, and most of all is a walking wealth of knowledge. D.

Thank you Bill and the crew for your excellent work on my 4.0 Jeep Head. You guys are outstanding.

After years and multiple attempts to fix my 5.9 front main seal leak Bill pointed me in the right direction. They know Cummins engines.thank you Bill

Had my hard to find diesel part for my duramax.

Very reasonable and always treat you right

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