Originally Posted by Fast Evo

The oldest drag racers trick is to extend the manifold into the turbo itself. What I am saying is that you make the manifold extend past the flange. What this does is stops the air from being enlarged as it enters the turbo and then being compressed again as it flows into the turbo. This generally creates about 2000-3000 rpm quicker spool. I took the AMS 35R kit and added an extension to my manifold and it works. Most of your import drag racers do the same. I learned of this from Matt Scranton from Scranton Brothers Racing.