FMF Factory-4.1/4.1C Spark Arrestor
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FMF Factory-4.1/4.1C Spark Arrestor

Part# 1133820001

Our price: $26.99

MSRP: $29.99 - You save $3.00 (10% off)

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  • Replacement spark arrestor for Factory 4.1 and 4C exhaust.
  • Simple to install.
  • USFS approved.

FMF Factory-4.1/4.1C Spark Arrestor Reviews

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0 of 0 people found this review helpful.

Good Product

Comments On Jan 13, 2014:Fit well and stops sparks, little more I can ask of it!

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Perfect fit, easy to install

Comments On Jul 11, 2012:Fits perfect in 4.1 FMF exhaust. Quick easy install. Looks good too.

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Fit good, looks cool.

Comments On Apr 16, 2012:Keeps sparks in and keeps me legal.

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It Arrests Sparks

Comments On Mar 22, 2012:Seems to do a pretty good job. Does seem to reduce the hit, not exactly what I was looking for, but then again, I prefer riding without one.
Add some removable blue Loctite, don't over tighten, and you're good to go.

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2009 crf450x

Comments On Feb 10, 2012:So far so good. I only have about 300 miles since installing it.

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Mounting system for Spark Arrestor is terrible

Comments On Nov 30, 2009:A spark arrestor is a spark arrestor, but the way it mounts is what matters. FMF did a bad job with this one. You can only tighten them a little more than finger tight before it strips out and if you leave it loose it'll rattle looser and fall out. Bad design all together. I sold the whole pipe after no help from FMF.

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0 of 0 people found this review helpful.

works great

Comments On Oct 13, 2009:makes my exhaust legal so I can do desert races. Cuts the sound a little too. I like it better than open.

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0 of 1 people found this review helpful.

doesn't let sparks OR exhaust out

Comments On Oct 10, 2009:My new pipe/silencer was a bit loud so I put the screen in to take the "bark" off the exhaust note. As soon as I had, my header glowed red so I took it back out. The screen is too fine and thus too restrictive.

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