<span style="color: rgb(255, 0, 0); ">looking forgoodExhaust? JP 4-JP3</span>

both are good pipes. but you might want to check out the dynamite 086 its alomst half the cost of the jammin

JP pipes work decent in some applications, but they always seem to be fuel hogs. Get the Dynamite.

What engine are you marrying it to?

<span class="Apple-style-span" style="font-family: Verdana, Arial, Helvetica, sans-serif; font-size: 11px; -webkit-border-horizontal-spacing: 2px; -webkit-border-vertical-spacing: 2px; ">Mac* .28</span>

If you run at a track maybe you want to ask a couple of the other drivers if you can borrow there pipe and see what the power band is like.
Pipes make alot of difference in the performance of your engine.

The man to ask would be supertib, this guy knows just about all engines and pipes from the inside out.

Hi Potilaracing, I have just had a word with Supertib and according to him the engine that s in the Hyper 7 (.28) is a piece of junk no matter what pipe you put on it so he advises you to go buy a better engine.
I have to say though that we have had Hyper 7's at our track befor and what Supertib said was what I was thinking seems how my GX.21 kicks ass against the .28 Hyper.28.(but thats to be expected as its tuned to kingdom come((a real screamer)).
There is however a .21 race engine offered by Hoboa that aint TO bad if your just thrashing your buggy around.
If you want a good engine that dont cost to much check out the GO engine line up,there great for the price.

sad to say, but I wouldn't waste a nickel buying a pipe to make a Hyper mach 28 to run good...your just wasting money souping up a lemon.......I would run it as it is, when your sick of it then just buy a better engine/pipe combo...your money would be better spent...

http://www.youtube.com/watch?v=JH4p7KDGo2I<div>my hyper 7 w/ lrp zr30</div>