Saw this over on LS1Tech - something that is done with HPT's.

"By cutting the MAF table in half and using a LS3 Sensor in a 4" Tube you QUADRUPLE the MAF limit. With the HP Tuner extended Hz Range hack you cannot peg the maf until 15000 + Hz. Which means you can control the entire fueling of the car with the MAF table. Very similar to FORD Tuning. "

Is this already in EFILive? Is this only able to do this on a E38/E68 ECM?