you can take that off , UPREV works far better, you even get 100% throttle in each gear.
Cookie have you got a Y pipe fitted as well?
Think Bennett found they worked well together after the tune. It doesnt alter the throttle opening, more a case of improving the reaction to get to full throttle. Bad example but instead of it taking 1 second to plant your foot and get the throttle open it only takes 0.5 seconds. Just from reading what people have said anyway, but im not the expert
Yes its the Nismo y pipe as well.