The intake manifold ports are reshaped since the airflow will now be going straight down (through the new phenolic spacer) rather than turning in toward the combustion chamber. Compare to the before pic.
Title:
Smoothed and reshaped intake manifold ports
Description:
The intake manifold ports are reshaped since the airflow will now be going straight down (through the new phenolic spacer) rather than turning in toward the combustion chamber. Compare to the before pic.