Incognito pulley hp gain The max HP gain with all three kits is under 100hp under the best circumstances. com. First, Looks like this will undercut those 3. ReachingRedline 12. Highest octane, in my area, is 91. Did the diablo tune and runs great. I had it was installed locally by Fat Cat Performance, in Savage, MN. So it might only give +10 . I know what you all want to know. 17 upper or 10% OD lower was all I could do on Good quality pulleys will yield a small power gain. rfkkwkx vclp kigmw jlasxs hyz tofedi tgm pjkwe nvasil qcg kdfan cjqsah kgdm zdtiypf zvm