Even though the extra power is great, increase in power requires ecm adjustment for the auto tranny. Mad has failed on this issue. Tech support is lacking in the knowledge needed and since my 2002 is old but new to me, with few miles, they seem not to care concerning the shifting of the auto transmission. In 7 and 9 setting it does not shift right. Still testing the number 1 for fuel mileage. I love the extra power but truly, do I want to destroy my transmission for this power. Contemplate.