Im thinking about getting the VI. How much does it improve your guys 1/4?

Derek
95 A/T Maxima

My previous best was a 14.94, and I went to a 14.77, but the weather conditions weren't as good, and I also got a test pipe and muffler at the same time. But, my trap speeds went from 90-91 to 93. I figure that in the same conditions on a good day, a VI is good for 3 to 4 tenths, and 3-4 mph in the 1/4 mile.