From my experiences, mechanics don't know jack about modifying an engine. They know how to repair something that's broken. I've talked to so many mechanics that did good repair work, but wouldn't know the first thing about nitrous, forced induction, extreme all motor setups. I would rather take the word of people who have had the parts on their car, and for a long period of time...firsthand experience is the key. Sequoia is cool, isn't it pretty expensive?