I simply epoxied a penny over the inlet of the SAS system of my '05 640A - jetting with taht !@#$ system in place is impossible. Simply too much cold air being injected into the exhaust manifold. I thought of removing the clutter, but decided that the route I chose was better. While I have an xtra x ounces of weight on board, I also only have 1 vacum post modifictaion to worry about vs. almost 1/2 dozen if I'f removed the system.
"...who gives a rat fornication?"