It's there to keep oil out of the PCV system, along with the valley pan (gasket). If heat in the manifold were a problem, do you think they'd put an exhaust crossover right below the carb on a stock...
Type: Posts; User: tufcj
It's there to keep oil out of the PCV system, along with the valley pan (gasket). If heat in the manifold were a problem, do you think they'd put an exhaust crossover right below the carb on a stock...