I am currently running a 4mm stroker pushing 73 HP on the dyno. I have all the usual mods but am still not happy at all with my bottom end. I realize I am never going to have stump pulling torque with a banshee but am wondering if anybody has one of the powervalve set ups and if it helped the bottom end much???? I would love to see a dyno curve on one of the powervalve set ups.