The cold air intake and the tune netted the same 1/4 mile times... My 1st tune was done onboard, not a canned tune. I went from 13.1, to 12.9 with the cold air intake, tuned, it came down into the 12.6-12.7 range. Added the 65mm pulley brought me down into the 12.2 range on street tires. This was the roadster. The coupe with similar mods, adding modified intakes, and a 62mm pulley, new fuel pump, will see even better times. So the last thing you do is a tune.... Tunes in those days on sale were $600 not a canned tuned on sale. Believe what you like, but you being tuned by guys like me in those early days at the track with or without mods running our cars with guy in the passenger seat, and sniffer hanging out of the exhaust seeing what the car was doing while running the quarter miles. Those times are 4 yrs old. Not much has changed other than the new pulleys available. And Rob's CAI was tested and tested, not just a few pieces of pipe and filter.... same goes on the intakes... I am done here...