FYI advantages of each pipe

[RideRed04]

Could people that own different brand pipes please post where they feel the gains from their pipes, what they had to do to make it run just right, and why they chose to buy it. I currently run stock and chose it becuase it came with the quad. I have another stock scilencer that I am in the process of welding back together after some sugery (the metal is very thin! Hard to weld), and will post a full summary of it when I am done.

I've got a Yoshimura slip on. I felt the gains from bottom to top. Nice gains but I'm not too happy with the noise. I think its pretty loud compared to stock.

EDIT: Oh yeah, I bought mine cuz nobody I knew had one and I thought I'd be different and the guy at Marcum's ATV said it was the $hit, so I figured I try it out. No problems getting things tweaked. Running lidless pingry aluminum airbox, ceramic coated stock head pipe, rejetted. I tried the rev box, but sent it back, I couldn't tell a difference.

The stock one is quiet...

[crday98]

i have the fmf power core IV-2 on mine.i didn't notice much gain in power but a massive gain in noise.the reason i bought it was because their website claimed it gave a nice power increase while being not much louder than stock.(NOT)this pipe was to be quieter than the origional power core but they sound the same.now they have the power core IV-Q,the Q meaning quiet,but i haven't had the chance to hear one.i'm disappointed in fmf,i feel i wasted $242 + shipping.i should have just went with white bros.

[skemp]

I have a White Brother's pipe, and I didn't buy it because Dirt Wheels told me to, but because it had some pretty impressive features and evidence to back up everything I had heard about it. It is a bit loud, but I have gotten used to it for the most part, and the gains it gives are impressive. I am very happy with the extra power it dishes out. One thing I noticed was that I can stay in higher gears longer instead of down shifting when I lose power. When I hit the throttle, the power is right there. For $220, it was worth it for damn sure. Plus, the thing looks good too. If I have left anything out, you can see more at my site under the tech tips page.

Every pipe will yield its own strengths and weaknesses, and to every person, each one will have different significance according to the tastes of the individual, but I think this pipe would appeal to most riders as it produces good power, and is relatively quiet compared to other performance exhaust systems.

[MOFO]

Well I feel that my FMF Powercore IV made a nice difference in power. Mostly at the bottom end, but with a nice increase in mid too. I find it impossible that people have this pipe and dont notice a gain. I've actually switched back to my stock pipe to see what the difference was. I did a test.....

There was a nice hill climb/power line with about 3-4 nice jumps while going up. With my FMF I could pull a nice WOT 2 gear run....with my stock pipe....not even close...I would have to drop her down into 1st because she bogged WAY down....

thats just my real world power test

FMF passed.

Eric

[honda4life]

I have a Curtis Sparks X-6. I checked out the ATV Sport with the test of the 18 pipes for the EX, it came down to the Sparks or White Bros., I decided to be different and get the Sparks. I noticed gains all the way through. It is very loud, but it really doesn't bother me. I love the pipe.

[Chef]

i had a WB slip on at first and what i noticed first off with just the stock air filter and jetting would that it revs quicker. After I got it rejetted and put on a k&n filter, it was a huge difference. i could then wheelie from 2nd to 5th in one wheelie, pull it up in 4th and keep it up, and as you can tell, there was a major difference in power. I have this because my friend can get everything at dealer price from his aunt and it was only $180. So my mom bought it for my birthday and i put it on the first time i took my 400 to the dunes. now i have the 440 and I'm waiting on my s-bend.

[kabd69667]

honda4life-is ur engine bored? bcuz if it isn't or ur not planning on it, they say that u get more power from the x-4 if u have a stock to midly modified engine

[inacoma91]

I chose the Pro Circut T-4. I think its a great slip on. I could tell a big difference when i installed it on and the K&N jet kit. I did grind out the welds on my stock header also though. I think this slip on has great mid range. Thats where i felt most of my gains. I only paid $190 for it and $44 for the jet kit. It was well worth the money. I would definitly recommend this slip on to anybody.


Andrew
2000 400EX
Moose Handlebars
CEET seat cover
Shaved fenders
Pro Circut T-4
K&N jet kit
14T drive sprocket