This is with a drop in K&N, Your 3.10 pulley/chip and a magnaflow catted x-pipe. The A/F was taken from the tail pipe. The dnyo guys were pretty impressed with your tune program. By the way the I've read what you've said about winter gas, which we have here in Chicago and it's ice cold out. I don't know how that might affect the A/F. I'm pretty happy with the results.