I initially ran a JP-3 on my 5 Port and it was "ok", nothing startling. I changed to an 086 Dynamite after reading the posts here and what a difference. I would recommend the 086 for the 5 Port in a buggy and also in a truggy for most tracks. If you run a really tight track with good grip then use the Dynamite 053 on the 5 Port (truggy only), it's a real stump puller combination. If the track surface goes away you might need to tame the clutch a little or go back to the 086.
I believe the 2047 is great on the 5 Port also, but value for money the Dynamite pipes are hard to beat