Valair organic for me. My stock clutch was slipping even with the relatively light mods I've done. Several emails and phone call to John from Holland Court Diesel and here I am. It's exactly what I wanted. The clutch engagement is smooth for towing, and the pedal pressure is actually less than factory. My truck drives better than when I got it.
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98.5 24V, 5sp QC SB 4x4, electric blue, 3.55, AutoMeter pyro/boost/FP, DSS, Diamond Eye 4" turbo back, Power Puck, Raptor, Valair 13" single disc organic, Icebox with Amsoil 4510, Challenger tool chest, timbom APPS