Hey,
I have a DEV5 + Race Header + Race intake fitted to my EF manual.
My impressions are that if you keep it below 3000 it feels fairly similar to standard, but over 3000, then it comes alive.
To give you an idea of how I get the car to boogie:
Drive along in first steady at approx 3000rpm, then nail it. Shift at the red line each time. The car fights for grip when you stand on it in first and then again above 5000rpm the tyres start to have trouble. Car is smooth all though out the rev range.
For the thread that I started with some pics of the kit:
Just got DEV5 for my EF (incl dnyo chart)
search for the thread with the above title in the Inline 6 Tech forum (I can't seem to get a link to work in a post)
or click below:
Just got DEV5 for my EF (incl dnyo chart)