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December 2025 by Thelma Self
Great help
Big or small jobs he ready to help
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October 2025 by Time Quarrels
Super helpful and knowledgeable! My go to engine builder!
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January 2025 by Kelly Marbach
Greg built me an engine for the Fireball Class at I-37 Speedway.
I dropped the engine in and it fired right up.
I did not have to set the timing or adjust the carburetor.
I ran the engine one full season and did not have to do anything except change the oil.
If I ever need another one I will for sure get it from Greg.
In addition to the great engine Greg is very knowledgeable in racing set ups and very helpful.
Thanks for all your help!
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November 2024 by Chandler Fox
Great service very knowledgeable, takes the time to explain any questions you ask.keeps us fast on the road and at the track.
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November 2024 by Bruce Wright
Spreen Engines and performance are at the top of the class. Greg Spreen and his staff are friendly personal and honest. We have been using Spreen Carburetors for the last 10 years and have 3 HMP and Texas Championships to prove it. Our 602 crate motor builder from Tennessee has VDL and Bill Pink carbs but when he dynoed my engines with Spreen Carbs they pulled 5-8 more horsepower than his house carbs. Simply put, honest fair and excellent performance. I will never go anywhere else.
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November 2024 by Ian Rohan
Spreen is extremely knowledgeable and is always more than happy to help and answer questions. The work he performs is top quality and nothing he has ever given back to me has given me issues. I personally don't trust anyone with machine work except for him.
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November 2024 by robert danielsen
Wanted to take a minute and let people know about my experiences with Spreen Racing Engines. Moving to Boerne from the Houston area was an adjustment on many levels. In the Houston area I used engine builders for small and large jobs while racing at pretty much all the dirt tracks . Over a period of twenty years I have had several bad experiences with lack of information or just no information on product knowledge and or helpful feedback with racing in general not just motor work .
After I was introduced to Greg back in 2003 I quickly learned that he is a perfectionist in his field. Also saw how he generally cares how you are performing on the track . When is the last time your engine builder told you how to set your car up and pass on great advice.
This very thing has personally happened to me several times with Spreen Racing Engines. Raced several tracks , winning several championships with his product. Never having to do more than maintenance honestly throughout the race seasons . Bottom line is he provides a service most racers never can find …. Motors , carburetors , parts in stock , and most importantly his knowledge. If your racing team choices to rush perfection and or simply want motors slammed together you probably need to look somewhere else. This engine builder will not and should not be in a position where a quick product is pushed out the door . Might look at your own racing program if people aren’t meeting deadlines .
Local small business is what he is , I can relate to good customer service that is a daily grind . I appreciate all Greg Spreen and Family has done for me personally and as a car owner of R&B Racing I can say nobody has ever came close to the services he has shown me threw the years .
You want the best then do your homework and let the man do his job ! Robert Danielsen
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October 2023 by Randy Rice (Rowdy 327)
I can’t thank you enough Spreen you are top notch with your work sir very knowledgeable on all that you’ve built for me from having pistons made for a 1935 cady to a entire 428 dart stroker ground up always perfection, took a little time but quality over quantity.
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October 2023 by Erica J B Salvatore
Best place to get your engine repaired. Very knowledgeable about all engines, Greg is very professional and always polite. He was able to answer all my questions on 2017 Tahoe.
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October 2023 by steven wood
Had a 454 motor built to 496. Greg Installed a cheep Amazon oil pan, painted it black and put moroso sticker on it to look like a moroso oil pan… oil pan failed. No telling what else was skimped on the build. Lots of issues.
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October 2023 by Roderick Mitchell
Water bill are ridiculous
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August 2023 by chris kato
Best engine builder around.
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November 2022 by Staci Andrews
Have been using Greg's services for years! Excellent machinist/engine builder with vast knowledge of all things mechanical! Stocks many hard to find parts & lubricants, plus He is always willing to share his knowledge to be sure your project gets done right the first time! ~ Hot Rod Garage
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October 2022 by Austin Wilson
Greg and his boys rebuilt a Nissan KA24DE with 165k miles on the clock 12 years ago, and since then I have logged another 200k miles on said engine. Needless to say, he was the obvious choice to "freshen-up" another long-block to keep my baby on the road for another decade, plus.This guy is the man, no question.
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August 2022 by Ryan Davis
Speen Speed Shop is the bomb! Extremely friendly, professional, and he knows his engines!What an expert! Very busy but made time for me and my concerns regarding a SBC and carburetors! Hands on advice, no BS, no selling you items that are not right for your applications.A must stop for any of your engines concerns!Thank you Greg … Good people for sure. And he has been around for 30 years!
