Got my Dynamite 053 and 086 pipes for my truggy today. I tried the 053 first because the tracks I will be running on are relativley small (longest straight is about 90 - 100 yds) with very tight inner sections. Whoa !!! what a difference. When you guys said the 5 port engines liked these Dynamite pipes you were not kiddng. I have been running and old OFNA 063 and a JP-3 during break in, but the 5 port took on a new lease of life with the 053 fitted.
I will see how the top end is. If it's ok I may not need the 086 at all.