Intakes are 34mm, so you are a smidge off. The ex valves are 29mm-29.15mm compared to a DE/T that is 30mm, that is what what I was meaning in my above post. I was pointing that out for you since you were having trouble on backpressure, you need bigger ex valves for less backpressure. This will also help you manage heat better...The VE head was made for all motor so they put a smaller ex valve whilst the DE/T have bigger ex valves since it is a turbo motor.