Anyone know how much I would expect to pay for a used Kenne Bell if i could find one. Where is the best place to try to find one used to try??? If not used what is the going rate for a new If i had to) Kenne Bell. Also how hard to install, also would i have to change any gaskets???? thanks Also do you really need to add the Boost a pump and other Kenne Bell products to get the truck to run right???