Photo Courtesy of Air Flow Research

For those looking to gain additional power from their LS3 powered machine, then the 260cc “Mongoose” cylinder heads from Air Flow Research (AFR) might be the perfect fit. These heads are designed to suit 4.000 or larger bore applications that operate up to 7,000 RPM.

According to AFR, these heads feature CNC porting on the intake, exhaust, and chambers resulting in the ultimate Rectangle Port head. These are not subjected to an outdated CNC process, AFR uses a 5 axis machine to ensure the best port work possible.

AFR puts countless hours into the engineering and flow techniques that make the “Mongoose” heads the perfect choice for LS3 engines. For those looking to make the most of their out of their purchase, AFR has a recommended list of parts to maximize the performance gains.

Features and Benefits:

  • For large bore applications up to 454 CID
  • A356 Aluminum Castings
  • Titanium Retainers
  • High Quality Components
  • Available with 4-bolt or 6-bolt
  • Smog Legal
  • LS3 heads ship with an AFR specific rocker stand that replaces the GM piece and is compatible with the factory rockers.

For those who reside in states where there are strict emission laws, there is no need to worry or contemplate the consequences because the “Mongoose” cylinder heads are smog legal. As long as the vehicle is a 2008 to 2015 model, the CARB number (D-250-5) will keep you safe.

For those who want to know more about emissions information or have specific technical questions, please take a few minutes to check out