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4-Stroke Exhaust4-Stroke Exhaust from Rocky Mountain ATV/MC
Exhaust systems in either full race or with tuneable spark arrestors and different tips to give you that perfect power output for either motocross or trail riding.
Latest ATV 4-Stroke Exhaust Reviews – You could win up to $500 for reviewing products!
FMF Titanium Megabomb Header Pipe
MICHAEL in IN
That's the stuff
I used the megabomb with an fmf speed muffler on my yz250f. It really woke it up everywhere. I trail ride, so I wanted more grunt. I got it and an awesome mid to top. This thing will rev to the moon. This is money well spent.
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Yoshimura RS-3 Stainless/Aluminum Slip-On
MATT in KS
Yoshi Exhaust
Awesome pipe, looks good, sounds great. Good power gain throughout rpm range
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Yoshimura TRC Stainless/Aluminum Full System
Beau in NE
Sounds Good
I bought this for a friend. He absolutly loves it. It sounds good and has great performance thoughout, low to high Rpms
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Motoworks SR4 G2 Full Exhaust System
Andy in ID
As good as they come!
Quality fit and finish compared to any other stainless exhaust fitted on my 2012 YZ450F. The only complaint is that the provided spark arrestor is not stamped USFS approved. My left over FMF may fit.
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HMF Racing Quiet Core Insert
JASON in KY
It lowers the db, but it lowers performance too.
It is very easy to install. For my KFX450R, take the end cap off and there is a recessed area that it fits right into. The flange was slightly thinner than the recessed area, so it rattled a little, but not bad. The db's are difinitely reduced by a very noticeable amount. Performance was not reduced at lower rpms, but the reduced diameter of the quiet core pipe definitley robs some mid and upper rpm power. Usually the atv would easily wheelie while riding in the woods/trails in 3rd adn 4th gears with just little rises in the trail. This was not happening with the quiet core installed. Still if you are going somewhere that requires reduced db's then this will get your atv qualified.
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Pro Circuit T-4 S/A Complete Exhaust System
shane in UT
killer system
Nice power increase, on my sons Honda crf 250f. very nice look improvement in looks and sounds over the ugly an have stock. Well worth money spent just for the improvement in looks.
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