Whenever you see the list for Z stages it always counts the underdrive pulley as a part of stage 1 or 2. To me this does not make sense because the pulley, more often than not gives about least 20 HP and usually even more torque and was the single most noticeable upgrade in my car aside from the ecu/boostjets... so I'm wondering why it doesn't get more credit because most of the incremental stages define a 15-20 HP increase. Just wondering...
Follow Ups
Why does no one consider UD pulley a stage??? - tdogzjoint00:38:49 12/19/05