well just like it says. thats what i did. the porting took a while. i found that a reinforced cutting wheel did the trick on the egr walls. the bbk afpr was a nice unit although the torq tool they sent was the wrong size. i cut the adjusting bolt down a bit since everyone said it made contact with the plenum. over all it was smooth. no contact and everything worked good. ran a bit funny at start up due to lower that stock fuel psi. bumped it up and it was great. test drive seemed a bit better but the butt dyno can be modified by the wanting to feel a big increase in power. i would say...an ok mod. every bit counts.