i ran a JP-3 with mine and it was insane...then the vspec crapped out at 2 1/2 gallons and moved to a P5X and the JP-3 rocks on that engine also...and finely i moved onto a werks B7.21PRO and the JP-3 delivered again...now i know what you thinking that i only have used one pipe, not true i have tried many pipes and kept going back the the JP-3....