After I programmed I definitely felt a difference and would recommend to any person who wants more out of their six. Plus hypertech have told me that updates will eventually come out for tuning a Cai like the mazdaspeed tuner.
Is there any benefits to shifting the automatic quicker? Is there programming for different tire sizes? What are hp gains. For $400 and premium octane i better see 15 hp minimum. I just filled up today and i had to make sure no one was standing behind me because i felt like i was getting it up the ass: $1.25 per litre Canadian for 87 octane (regular). I already know i have a V6 and this is the 4 banger model, but above questions are valid.
Website says with premium fuel you can expect gains hp gains of 7 hp and 10 ft lbs of torque....plus if you look around you can get one for under $380. I would say worth it....my six just feels better with it