Images by Jason Isley
Project cars are hard. Case in point, when we left off with our Classic American Muscle CAM-S twin-turbo V8 beast, we were getting the long-block assembled, and what took a week on RACER.com was almost a year in the works. Now it’s time to work on the peripherals.
Switching to LS9 CNC‑Ported Cylinder Heads
The switch from the stock cathedral-port LS6 cylinder heads to the GM Performance Parts CNC ported LS9 cylinder heads necessitated an intake manifold replacement, as the new heads featured a rectangular port. Additionally, the new heads combined with our Comp Cams Valvetrain upgrade meant that the engine had the potential for increased airflow, so it was time to look for yet another upgrade.
The latest intake manifold from Fuel Air Spark Technologies, the Fast LSXR 102mm, would serve to increase air capacity over the outgoing LSX 92mm unit previously fitted to the engine. In addition to the larger opening at the front of the intake, the modular design of this manifold all
