Originally Posted by MikeR
Shelton,
I think he is talking about the inside of the line pipe where the TB mounts. It looks like they did a little work on the left and right sides. They didnt take out the BIG hump from the line pipe like BDJ did.
MikeR
The big hump is used to redirect the air, when the rotors are spinning there is a small amount of back pressue that gets pushed towards the TB. That ridge splits the air and helps to allow it to be redirected back into the supercharger, it helps prevent any pulsing or shock wave turbulance. I know on Evosport 80mm TB kits that the piece in the housing is removed.