I am pretty sure my clutch is starting to slip, but was wondering if there is anything else I can do to confirm it. When I am in a high gear and I floor it, the rpms shoot up a little and then I take off. When I race someone though, my clutch grabs beautifully and doesn't slip in any gears. The car only has 70,000 miles and is not running BPU yet. It has exhaust and downpipe. Is it my clutch?