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All new designed 12Bolt KA pistons. For 250 and 292 in .040 and .060. Same specs as our forged pistons except made in hypereutectic alloy. The cost is much lower, but performance is almost equal.
Some specs. Taller than stock CH, modern low tension ring packs.
In stock and available from 12Bolt
250 version https://www.12bolt.com/store/p1139/...ston_set_5.7_rod_and_Long_Rod_292_2.html
292 version https://www.12bolt.com/store/p1137/292_CHEVY_Pistons_HYPERUETECTIC_LPG_PROPANE_GASOLINE.html


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Information and parts www.12bolt.com

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Cool! Who makes them?

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Made by UEM for 12Bolt


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Information and parts www.12bolt.com

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Originally Posted by tlowe #1716
Made by UEM for 12Bolt
Very nice. I didn't realize UEM was responsible for so many piston brands/lines. What brand or technology that UEM offers could or should these pistons be associated with?

Last edited by moregrip1; 09/25/25 12:56 PM.
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At any rate I think these are a great idea and thanks for bringing them to market!

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John Erb (of supercharged Studebaker fame) came to Carson City, Nevada to talk to United Engine about making Hypereutectic pistons of his design for supercharged Studebaker V8s. They offered him a job as an engineer. I don't think he had an engineering degree. He at his time there designed Keith Black & Silvolite pistons and proved that hypereutectic pistons handle boost well. My son worked for him summers through high school & college and because of John he is a mechanical engineer.


"I wonder if God created man because he was disappointed in the monkey?" Mark Twain
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Similar situation happened to me over this past summer. I mentioned some of it to you already Beater, but after almost 20 years as a Class IV CNC Machinist/Programmer, I reached a point that the company I was working for could not longer compensate me for what I was bringing to the table. So I had an Indeed recruiter reach out to me about a position in their Engineering Dept. Less than 24 hours after applying, they contacted me, I interviewed and offered me a job. This company caters to the Aerospace Industry, and supplies products to all the top Department of Defense Aviation and Aerospace contractor s in the country. With my nearly 40 years experience as a Machinist, with half of that involved in CNC and programming, I now use MasterCam software to create price quoting for these Aerospace parts to submit to our customers. Who would have ever thought that at 63, a new chapter and career would begin....



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That is good news, you have to keep moving. No need to stay where your skills are not appreciated. Don't know why I stay home so much?

Have you written anymore mysteries?


"I wonder if God created man because he was disappointed in the monkey?" Mark Twain
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I'm working on a sequel to the first one that you've read, and the other is more modern, and because of this new job, is more CIA, Jason Bourne influenced...



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Looking forward to seeing it. May as well turn this into a book club. laugh


"I wonder if God created man because he was disappointed in the monkey?" Mark Twain
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It's funny that there are more off topic conversations here than on topic...



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The folks that are actually building and posting about it are doing it where someone will see it and respond. It is not that there is no interest in our engines and builds. It is that there is little interest in our club and website. What doe it offer?

Last edited by Beater of the Pack; 11/12/25 06:26 PM.

"I wonder if God created man because he was disappointed in the monkey?" Mark Twain
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It doesn't (Honestly) Offer anything anymore, as for the chapters what do any of them do anymore. I know the Fla. Chapter pretty much dead.


Larry/Twisted6
[oooooo] smile
Adding CFM adds boost smile
shocked God doesn't like ugly.

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