which pipe should i get?

neither...ofna 086

really?

if you have those two pipes, run the JP3

the jp3 and 4 are 3 chamber pipes and lack top end they are also fuel hogs,the jammin 2 is my choice pipe if i wanted to stay with jammin.
the ofna 086 w/round header(or dynamite 86)is amazing with the force .28 and i trust you wont use anything else once you try it.
i have tried all these pipes on my nephews lx buggy with the force .28 so i speak from experience.

wow that much difference?

so u saved fuel with the ofna 086 w/round header? where was the power band and how many chamber is it?

here is the info on the dynamite 086: http://www.amainhobbies.com/product_...-Hard-Anodized

the ofna 086 isnt as good IMO, not as good of a stinger and is a cheaper design IMO the dynamite pipes are great.