AFR Introduces LS3 Mongoose Cylinder Heads


New from AFR – the 260cc Mongoose heads for the LS3/L99 engine platforms. These cylinder heads can flow up to 384CFM and are built to last. See more details below.

Official Release:

Air Flow Research is proud to announce the release of our brand new Mongoose LS3 cylinder heads on May 20th, 2017.

The all new 260cc Mongoose heads for the LS3/L99 engine platforms feature 69cc combustion chambers and are available with a standard or 6-Bolt pattern. Manufactured out of virgin A356 aluminum, featuring 100% CNC ported intake and exhaust runners, these head are capable of flowing 384CFM @ 0.700” of lift. Designed for applications running a 4.000” or larger bore size, with a displacement up to 454 cubic inches, operating below 7,000 RPM. CARB approval is pending for GM vehicles between 2008 and 2015.


  • 69cc combustion chambers
  • Available with a standard or 6-Bolt pattern
  • 100% CNC ported intake and exhaust runners

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Chris McWilliams

Chris McWilliams grew up watching his dad race go-karts around his Southern Indiana home and started racing junior dragsters when he was 10 years old. Chris drove a UMP Mini Stock for two seasons until he totaled his racecar in an accident at Western Kentucky Speedway. He is currently a college student at Oakland City University working on a degree to pay the bills for his dirt racing addiction.
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