Excellent work, very professional had cylinder head on our John Deere 750C done in less then a week. We will do all of our business through Colorado custom cylinder heads.-thank you

I have no idea why my previous review was 1 star... Gary and the team was great, rebuilt my head, bored and honed a block, amazing work. Would totally use them again.

Awesome service, exceptional detail and customer service

Brought some heads here because I was pretty sure they were cracked...they found the crack quickly and didnt even charge me for an inspection and gave me a killer deal on a set of new heads. These guys are great and Ill refer ANYONE that needs head/block work to this place...and thats from a 15+ year diesel technician.

Gary is a very knowledgeable guy,And does great work

Great people and top-notch work. Would recommend them to anybody. I will be back.

Colorado Custom Cylinder Heads rebuilt my Jeep Cherokees 4.7 stroker head 6 months ago after another manufacturer did a poor job with it and my valves burned up. I waited 6 months as I wanted to be sure everything went well before leaving a review. 6 months later it still runs great. Gary was very helpful and the pricing was more than fair. I would highly recommend this company for cylinder head work should anyone ever need it.

Impressive. Heads arent done yet but Im very confident they will be perfection.

Had the machine work done on my Ls1 rebuild here. Also had my 243 heads ported, both came out great and have held up to 730whp after I assembled the motor. Gary was extremely professional and answered all of my questions, couldnt give this shop a better recommendation. I do all of my own work except for machining, nice to know there is a local shop that I can trust.

They were a good price and did I great job

As my first bare block build I had placed my trust in Garys work. From my short block build to my bare aluminum heads done fully, any question was always answered intellectually. Ill send every hot rodder here...After they asked why I smoked em....

BEST PLACE IN DENVER, EXCEPTIONAL CUSTOMER SERVICE AND NOTHING BUT THE BEST WORK LEAVES THIS SHOP. WOULD REFER ANYONE NEEDING ANY CYLINDER HEAD WORK.

Great place had my 454 worked on there and they did great i would recommend them for work they now what they are doing

Did my brothers engine good price and excellent service. I recomend

Ive known Gary DeWerth for 25+ yrs.- Hes Always been PITA Picky when it comes to Details concerning Automotive Engine and Cylinder Head Re-Building / Re-Manufacturing.- Whether its a Race Engine for Short Track, Long Track, Dirt Track, Street-Rodding or Drag Racing, Gary DeWerth has the Knowledge, Credentials and Trophys to Prove hes in an Elite Class of Automotive Machinists with one of the Top Racing Machine Shops in the Country. Check out the Trophies in the Photos.- Who am I to talk about qualifications? Ive been an ASE Certified Master Automobile Technician since the 70s so I Know Quality when I see it.- If I were getting Engine Machine Work done for My ride it would be by Garys Shop.

Gary is a true mechanical artists. Fast and friendly service.

This is the go to place for your work. Customer service is always outstanding and work is always above expectations.