Windchasers2k! What is the weight of your arc radiator? I know that not too many whores in this forum have this arc radiator. This arc radiator helps to release engine heat more efficiently than the denso radiator. Since you have supercharge, it is a big . I do not plan to install supercharge to my car, I want a nice radiator for bling and weight saving to compensate for the rear weight reduction. I removed the rear spare tire and replace it with a light air compressor and tire plug kit. The rear re-enforcement beam has to be removed to install the spoon sport rear bumper and carbon diffuser. Future replacement will be asm dry carbon trunk and spoon sport or equivalent dual exhaust set up. The s2000 is a well balance car from the factory. Any modification will upset the overall balance and dynamic of the car. I am trying to balance this issue to prevent negative outcomes.