These mani's are awesome! If I could only give one suggestion, put the bung in the drivers side mani, as this would be the closest route to the pillar where gauges will be mounted( I had to cut and splice my wiring to make it stretch that far ). Otherwise after driving a while with them I feel I have more power now, I think the four runs I had last Sunday wasn't enough time for the computer to fully adjust. This thing is flying now!!!! I'm real excited to go back out with these and the colder weather, lookout record book!