[KFX 400 exhuast] - ATV Riders Forums - Honda, Yamaha, Suzuki, Kawasaki, Polaris, CanAm, Arctic Cat, Kymco ATVs

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KFX 400 exhuast
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Posted by: HondaRider250

A kfx 400 might be coming up in my future..i was wondering what pipe would be best for it. i want a loud pipe thatll give me a big horsepower increase. any suggestions?

Posted by: atvnewb

HMF, mine made a huge diff.

Posted by: kfxriderirv

i have a rossier and it made a big diff.

Posted by: Leschj03

my buddy has a 04 z400 and he put on the Alba full pipe kit, it made massive hp and torque increases. it's also one of the loudest pipes on the market. another thing you might want to look at is the price! it was only 450 over the phone. i'd recommend it for ya, he loves it!

Posted by: KFX400MAN

White Bros R4 exhaust it made a big difference and is very loud.

Posted by: fstz40088

hmf all the way!

Posted by: HondaRider250

if i buy the hmf, is the full system worth the extra 200 bucks?

Posted by: atvnewb

yes it is, the silencer is nice for top end but the pipe gives you your torque increace by not restricting the airflow and providing the right amount of back pressure.

Posted by: HondaRider250

how loud is the hmf exhaust? my elevation is about sea level, what should i rejet the kfx to?

Posted by: Volt [Z440]

Ok here are the results of the dirt wheels pipe shootout for the Z400.

PIPE --- HP @ 4000 RPM --- PEEK HP

Stock --- 15.6 --- 32 @ 7200 RPM

Alba --- 18.8 --- 33.8 @ 7350 RPM

Big Gun --- 18 --- 33.8 @ 8000 RPM

CT Sonic --- 18.1 --- 35.3 @ 7950 RPM

DG --- 18.5 --- 34 @ 7000 RPM

Duncan FB --- 18.7 --- 33.8 @ 7250 RPM

FMF --- 18.6 --- 33.9 @ 7100 RPM

Graydon --- 18.4 --- 33.8 @ 8200 RPM

HMF --- 18.8 --- 34.5 @ 7500 RPM

MBRP --- 17.8 --- 32.5 @ 7100 RPM

LRD --- 18.3 --- 34.4 @ 7280 RPM

Pro Circuit --- 19 --- 34.2 @ 6900 RPM

Trinity --- 18.3 --- 33.5 @ 7000 RPM

White Bros E --- 19 --- 34.1 @ 7000 RPM

White Bros R-4 --- 18 --- 34 @ 7250 RPM

Yoshimura --- 18.5 --- 34 @ 8300 RPM