The SLP's have proven to be able to produce 80+hp. They just do it early. If you are serious about wanting to make the motor come alive sooner, you can do it with a pipe change and manage to do it with out actually losing power like you would going with the typical inframes like PC's, FMF, Toomey's, etc. You won't be able to really wind it out like the shearers do, but it will freight train off the bottom.