Jon Rogers' VK56 Head Failure Autopsy + Hidden GSC Spring Kit Upgrade!

Jon Rogers’ VK56-powered Nissan 240SX has already proven itself with low 7-second passes… but a valve guide failure cut things short. In this teardown, we show exactly why it happened—and more importantly, how we’re going to fix it. With help from GSC Power Division, we engineered a custom spring kit that isn’t even available to the public yet. By mixing parts, doing the math, and refining the setup, we’re giving Jon a head package that’s designed to take his 240SX deep into the 6-second zone. This isn’t just a rebuild—it’s the evolution of the VK56 platform at the highest level of drag racing. 👉 Subscribe for more: cylinder head teardowns, porting, CNC, and behind-the-scenes development from HeadGames Motorworks. #VK56 #HeadGamesMotorworks #GSCPowerDivision #240SX #DragRacing #CylinderHead