If your doing long strait pulls most the time, cpis or shearers will be good, anything other than that, get slp pipes. They make the same power but come on earlier. Traction is an issue most the time bc the power comes on so strong and fast. I will say pcs are a nice pipe too I loved those when I had em. but if ur gunna spend the coin and don't mind go with those 3 I suggested. just my 2 cents