Called AGA regarding changing the tumble flap with their own aluminum one, drove there all the way from Huntington Beach, left the car and after 15 min received a call stating that not the tumble flap is broken and something else was which will require to change the hole intake manifold for $2000. Decline the offer and repair the car myself, and found out that the tumble flap was quite broken and nothing else was defective. They tried to make me change the hole intake manifold so they can sale mine to somebody else. Pathetic. If not that was the intention then their mechanics are not that good for giving me a wrong diagnostic.