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August 2025 by Tina Helms
My husband took his head there for them to replace valves they it for a month and when he went to pick it up it was in pieces and they claimed that it couldn’t be repaired I don’t recommend taking any head or machine work to them
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February 2025 by Jim USN ET1 Ret.
As a general rule, I can tell you I trust nobody but the GM dealer to work on my truck. However I TOTALLY trust Duncan to work on my truck. He is a great mechanic, and is very reasonable on his prices.
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December 2024 by Amber Fortner
He's always been good to me and my family. Fair, honest, affordable.
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July 2024 by David Best
Took advantage of my boys. Car didn’t even make it home, engine overheated. DUNCAN and his crackhead help SUCK!
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September 2023 by winfred joyce
built a engine for irock over 3000. l bought the parts .summer time ,freeze plugs came out parked in my yard.at75 miles it begen to smoke,at 125 miles it blew up,it was a cross fire engine in it ,i never talked to him about leting him have, he said that was part of the deal,i never seen it again. 76 jeep 304 engine,my friend crashed it, i got duncan to fix a burnt valve ,check main bearings ,he called when it was ready, he said when you find a jeep to put in,i will be puting it in ,how about me storing it under work bench,wont be in my way he said.i paid the bill and agreed ,hard times, broke ,had a buyer,first i didnt pay bill, he allways used ones w/copies, .he couldnt show my copy of bill . then couldnt find engine. put starter on 88 bronco, drove from his shop to p.springs post office,it fell off. g.willard (junk yard) was pulling in ,looked at it went got bolts ,fixed it for free.brake job on chevy car,left rear lugs loose,5 miles had to replace all. toyota truck,shifter replacement,done great couple weeks,went up mountain (meadows of dan ) ,. transmission came apart. upon inspecting it ,found the shifter bolts just started w/a pocket knife under on side ,a gasket scraper under the other,the incline slung trans greese/oil out ,dry,he was good for several years,good to me ,i would not have taken a auto any where else. i would rather walk now,and would ,and he still wouldnt touch it. i hope he is better to you guys ,i wouldnt say anything about him,that i wont say to his face ,or have allready. i guess he has got a lot of assets ,i rather have nothing,if it came that way, he must make his self proud, i say most victoms are scared to say much,LOL LOL LOLServices: Transmission
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July 2023 by Patricia Merriman
Very pleased with my experience at Duncan Speedshop. Dennis repaired my vehicle and he stands behind his work and the price was much less than what I was expecting.
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July 2023 by Noel Kornett
Small but capable shop. Owner is an excellent troubleshooter and technician.Had a state inspection today.
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August 2022 by Linda Lambert
Dennis is a great guy. Great prices. Great work. I've been coming here now for almost 2 years and IHave tried other places but I always seem to go back to Duncan Speedway!!!✌️?
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February 2022 by Virginia Karr
Had a oil leak, they got the work done in one day. Valve cover gasket replaced and was reasonable in price.
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December 2021 by William Barbour
Fast professional service. 3 times I've had repairs. Duncan was less expensive estimate than others and guaranteed all work. Had 0 problems.
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September 2021 by Leo White
Want and asked if he can fix a 1952 plymouth and he said yes he can, bringing my car to him on Monday. Update great guy and he goes way above and beyond to help his customers.
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July 2021 by Ashley Hauser
Phone manners need some improvement. The person I spoke with was pretty rude
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May 2021 by Brian Morris
Duncan he a nice ? guy.
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February 2021 by David Barnwell
Awesome
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February 2021 by Leon Carter
I'm very pleased with duncan Speed shop he's been my only mechanic for over 10 years he even answers my calls on his days off great mechanic
