I'd say that depends on your goals, the fluidampr probably isn't better at very high RPM due to the way the fluid dampening behaves, but it's what, half the cost? If I were building something crazy I'd go with the ATI based on all the research I've done, but frankly there've been a ton of stock damper 1000hp cars (well relatively speaking) so I'm not that worried for as weenie as my goals are /ubbthreads/images/graemlins/laugh.gif