Tru Cylinder Head and Machine

11/11/2026

Built on hard work. Protected by heroes.🇺🇸

Thank you for your service, your sacrifice, and everything you gave so we could keep building. Happy Veterans Day from the Tru crew.

11/10/2026

Yesterday’s project, today’s finished product. 6.6L LB7 Duramax heads, done right at Tru Cylinder Head & Machine.⚙️

Questions about your heads? Send us a message.

Shop these heads:

https://www.powerhouse-diesel.com/products/duramax-cylinder-heads?utm_source=facebook&utm_medium=social&utm_campaign=tru_2026_11_cylinder_heads&utm_content=lb7_head_post

11/09/2026

Precision starts before the first cut. LB7 Duramax heads getting set up right at Tru.

Need Duramax head work? Call (865) 548-8520

11/06/2026

Rooster, our office dog, has inspected this GM 5.3 LS long block and given it his approval.🔧🐾

Gas or diesel, heads, blocks, or complete engines, we’ve got you covered.

Call (865) 548-8520

11/05/2026

Come take a tour. This is where heads and blocks get done right, diesel or gas.🔧

123 Mount Horeb Rd, Jefferson City

11/05/2026

If Tru has done machine work for you, we’d love to hear about it. Our crew puts a lot of care into every head and block that comes through the shop, and your review helps other folks find us.
Leave us a Google review here:

https://g.page/r/Cd-sTDeXk06AEAE/review

Post a review to our profile on Google

10/30/2026

6.4 owners, this one’s for you🙌🏼

This Powerstroke short block the full Stage 1 treatment: screw-in oil plugs, a Stage 1 cam, coated pistons, Mahle performance rod and main bearings, and our full machine work service.

This is what we do at Tru.

10/27/2026

Bored .020 over and honed to perfection.👏🏻

This 6.4 Powerstroke block goes through 3-4 honing grits depending on the application. That’s what gets the right crosshatch and finish for oil control and ring seal.

No shortcuts here at Tru.

10/26/2026

The foundation of a strong 5.9 starts up top.🔧

Screw-in freeze plugs. New guides and hardened seats are all done and ready for the next build.

10/23/2026

Turning up the power on your 6.7? Your head needs to keep up.👀

This one got O-ringed for better sealing under boost, stage 1 valve springs, screw-in freeze plugs so they won’t pop out, and our full machine work service.