I believe DemonSVT has removed his intake butterflies and his car runs particularily strong (14.7s@96mph). I don't know how he didn't loose some lowend torque when removing the butterflies.
Variable intake manifolds are very simple in design and are extremely effective. It's a shame more companies don't use these setups.
My 96 Maxima only uses long intake runners which make for good torque, but kill my topend rpms. My car runs out of breath at 5400rpms on the dyno. HOWEVER, a 6 months ago a group of Max owners found out that the 96-01 Japanese/European Cefiro (Maxima) runs a variable intake manifold. There are approximately 7 guys at maxima.org running these JDM manifolds right now. On the dyno power to carried straight to the 6500rpm fuel cut and people are noting a .3-.4 second drop in ET and a gain of 3mph. My JDM manifold will be here next week

100+mph traps here I come. I will probably get a JWT ecu to extend the rev limter to 7000 and add some more midrange power.
Dave