hey.. i have a 2002 rubicon and was wanting to put on an exhaust for it that has more horsepower and is light, so out of the FMF Megamax II and the Big Gun Utility, which one gives more horsepower? lighter? and last longer??

 

I still use stock exhause, but i have seen alot of reply's on the "HMF not FMF" exhaust. Lots of peep's like this for the performance. I really cannot comment on the others that you list. Sorry.

Jonathan

 

Hi RubiMudder07,

I put a Big Gun about 2 months ago. You can see a big improvement in low end. It is about 20% louder than the stock with a deeper sound. I would also say it is about 5-8 pounds lighter.

It took me about 2 hours to install and that's because I didn't take out the header in the beginning. Make sure you remove the header first otherwise you cannot install it unless you destroy the old muffler.

My Rubi was extremely rich so I did not touch the jettings.

Advantages:
More low end power
Lighter
Looks cool

Disadvantages:
Quality not as good as original muffler.
You have to change the muffler pack every 50-100 hours.

I bought mine from Moto-Joes for $269. I personally think it is better than the Megamax.

Let us know what you decided to do.

Marco Polo

 

I tried the FMF and sent it back. Piece of crap. The end cap on the silencer cracked and blew a hole through it. Next the hex head bolts started to fail. Went to Big Gun next & loved it. Other person is right though, you gotta repack em. Not the quality in workmanship as the factory. Better sound and faster in accelerating. I did the slip on in under an hour after taking the header pipe off the engine but not taking it completely off the quad.

I replaced the four hex head bolts that hold the end cap on the Big Gun with stainless 1/4" bolts cause their hex heads fell out.

Did you guys know that Big Gun, White and FMF are related and affiated companies? No kiddin !

 

Trust me don't get the big gun mine fell after two months. Highlifter wouldn't stand behind it.