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FMF Factory 4.1 Quiet Core Insert - 040304

  • Part #:
    433979
  • Manufacturer Part #:
    040304

MSRP Price: $39.99

Our Price: $35.99

You Save $4.00 (10%)
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Overview of FMF Factory 4.1 Quiet Core Insert - 040304
  • Replacement quiet core insert for Factory 4.1

Specs for FMF Factory 4.1 Quiet Core Insert - 040304

Type Insert
Type Silencer Insert
Units Each
Weight 0.35 lbs

Alternate/OEM Part Number(s):

18600178
Specs for FMF Factory 4.1 Quiet Core Insert - 040304
Type Insert
Type Silencer Insert
Units Each
Weight 0.35 lbs
Fitment for FMF Factory 4.1 Quiet Core Insert - 040304
See if this part fits your ride

Part 433979 fits the following machines

5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Stars
2
0
0
0
0
Fit
5.0 / 5
Quality
5.0 / 5
Style
5.0 / 5
Value
4.0 / 5
Fit
5 / 5
Quality
5 / 5
Style
5 / 5
Value
4 / 5
Good Product
This Insert has a clean fit at takes seconds to install and remove with an allen wrench. The spark arrestor is USFS approved and it does quite the pipe down a little bit, maybe 2dbs or so.
July 7, 2011
Fit
5 / 5
Quality
5 / 5
Value
4 / 5
Awesome product for awesome race
Dennis Kirk was the only place i could find with this part in stock(tried 5 places in California first, even FMF themselves were out of stock). I Ordered it tuesday, recieved it wednesday via UPS red(Minnesota to So Cal in 18 hours!), installed the same day in 2 minutes, then loaded my bike on the ferry for the 2010 Catalina GP that afternoon. The part let me pass sound check and spark arrestor check with flying colors. Fit great and did it's job.
December 13, 2010
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Browse 2 questions Browse 2 questions and 2 answers
Does this affect power?
A shopper on Mar 31, 2018
BEST ANSWER: I put one on my 570 Husaberg - no power difference that I noticed. I did not dyno the bike though. It did make it quieter but not by a huge amount. Went from obnoxious to loud.
This is the one for the Q 4 ?
don a on Aug 20, 2017
BEST ANSWER: No
Replacement quiet core insert for Factory 4.1
Instructions and Manuals for FMF Factory 4.1 Quiet Core Insert - 040304