Well, I am loving my SHO but sometimes when I get over four thousand RPM I notice a power loss, engine is revving up but the car does not seem to want to go anywhere. If accelerating hard and it occurs you can definitely notice it. Car drives and pulls fine below 4k. It does not seem to be at any certain RPM or anything, just kind of random... seems to do it more when it gets hot. I just replaced the fuel filter but that did not help... Any help from the SHO Gurus?