I'm not quite sure where this post belongs and I'm just curious about these 2 things. being an old muscle car guy and still a little new to the world of import performance and maybe I'm a little slow here (and I don't mean my car either) and I love my Scion aI am also one of those guys who will spend $3200 plus labor to have the SC installed. But my question is in the performance listing on Scion.com when you build your own how is a battery tie down and a radiator cap performance? would somebody please explain that to me? espically when a battery tie down is standard in one form or another on all cars.