My girlfriends SR20 is an automatic and has a weird hesitation at high RPM's. Example: I'm on the freway, then I floor it, and when it gets to about 5K it drops to about 4.5K and then no problems. The car starts off fine and everything else it in tip top shape. But I just have no idea why it would do this. Any ideas of where I should start looking? TIA

Martin

Oh, the car has a POP and Stillen headers.

Anyone:confused: