New Products

NOS GM Parts  Feb 2019
235, 261 Finned valve cover Oct 2017
153/ 181 Finned Side cover Oct 2017
Dual Exhaust Cast  Steel Manifolds Oct 2017
Complete inventory of Langdons Stovebolt for 230-250-292 is brought over to 12Bolt.
Alum or cast steel Thermostat Housing Adaptors Oct 2017
450 3 BBL carb in stock 12/22/2016
PES intake is back in stock 12/14/2016
Updated parts inventory 10/29/2016
Turbo Manifold  Sept 2016
7/28/2016 Finned Aluminum Valve Cover for 153/181/2.5.3.0, 4 cylinder
Long rod for Chevy 292 is now in stock!
A 2 piece timing cover is in stock.
Our goal is to help you build your car with what is needed for your car. Don't spend extra money on gimmicks, but check out the services I offer. I put special attention to detailed and quality products.

I can help with a 'bolt in lump port kit' or a 'performance intake lump port head' work for your inline Chevy 194, 230, 250, 292 and 153,181, 2.5, or 3.0 mercury engines. Plenty of Chevy inline 4 and 6 performance parts in stock and ready to go.

Our services also include 12 bolt rear-end restoration and rebuilding. We have a wide selection of rears in stock and ready to build!

Check out this instructional video on how to add a bolt in lump kit to your head.

Recently, dyno testing was done on a Chevy 292 to test street speed parts. The same type testing was also done on a 250.

Thanks for visiting my site! Hopefully you will find the information you are looking for. -12Bolt Tom google-site-verification: google199b67ff9d8d2d77.html

What We Do

  • 12 bolt/10 bolt rear axle rebuilding/repair
  • Inline chevy 6 performance, 194,230,250,292
  • Engine parts (Turbocharging and Bolt In Lump Port kit)
  • 64-72 Chevelle parts/ restoration