So I'm Port Matching another RBC intake manifold for a customer.

These are just some starter photos. I'm boring out to 70mm and port matching runners

started with runners. Mocked up gasket to check and mark how much to cut out




My goal is to clean up the runner smooth compared to factory rough


So I started removing material


And then smoothing out the runners like so


More Pictures of the runners almost finished.





Now onto the TB
Mock up the gasket


cut lines


Porting out to 70mm


See this nipple.. I want it gone


So I started removing it



Now time to smooth out the plenum