I have a naturally aspirated VX. I added the Granatelli MAF last weekend. Disconnected the battery and reset the ECM. After 100 miles plus, I have had no problems with it. As to performance, I ran a 0 to 60 of 7.3, and an 1/8th mile of 9.92 @ 70.2 mph. Fastest I ran previous to installing it is a 0 to 60 of 7.70 and an 1/8th at 10.15. It was a gorgeous day with perfect weather, so I may just have been fast the day I tested the new MAF . . .