CNC Port Match Nismo intake Runners
- From 43mm Runner size to 46mm
- Enlarge opening taper on the start of the intake manifold runner to open to the throttles to 48mm bore size and transition back to 46mm runner.
The Nismo Intake runner can be ported larger but you run the risk of making a hole in the runner due to inconsistency in wall thicknesses from the casting process.
