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Q4 HEX S/A ()

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FMF is the leader in high performance quiet technology and our Q4 HEX is the next evolution in off road exhaust. The Q4 employs intricate chambers, baffles and proprietary multistage packing material making it the best performing quiet muffler available. With the Q4 you don’t need to hear the power, just feel the power!

-Less sound equals more ground

-Meets USFS and FIM World Enduro sound regulations

-Power gains throughout the entire rpm range

-Spark arrestor included

-Pounds lighter than stock

-Rugged design for off-road endurance

-Only US manufacturer to offer dedicated quiet exhaust systems

-MADE IN THE USA

-See Features Tab -> Fitment for header compatibility 

Notice: Closed Course Use Only
Item ID: 045667
Type: Slip-On
Configuration: Single
Const: Aluminum
Finish: Natural
Midpipe: Stainless Steel
Endcap: Stainless Steel
Spark Arrestor: Screen Insert (included)
Carb Warning: no
Quiet Insert: 94dB Insert (included)

Item Id - Manual Description
041486 - INST SHEET HON CRF250L'13 PC-4.1/HEX Q4 MFLRS (041486/89)
041516 - INST SHEET CRF450R'05-06/CRF450X'05 TI P-CORE MFLR (041202, 041204,041236, 041237)
041522 - INST SHEET HON CRF250R'14 SINGLE HEX PC-4/Q4/FACT-4.1 RCT MFLRS(041521-28)
041544 - INST SHEET HON TRX450R'06-07 SPEED MFLR (041263)
041558 - INST SHEET HON CRF450R/RX'17 SINGLE PC-4/Q4 MFLRS (041557-58/63-64)
041564 - INST SHEET HON CRF450R/RX'17 SINGLE PC-4/Q4 MFLRS (041557-58/63-64)
041564 - INST SHEET HEADER
041568 - INST SHEET HON CRF250L'17-18 PC-4.1/HEX Q4 MFLRS (041567-68)
041570 - INST SHEET HON CRF250L RALLY '17-18 PC-4.1/HEX Q4 MFLRS (041569-70)
041578 - INST SHEET HON CRF450X'19 HEX Q4 MFLR (041578)
042296 - INST SHEET KX250F'09 PC-4/Q4 MFLRS
042328 - INST SHEET KAW KX450F'09 PC-4/Q4 MFLRS
042341 - INST SHEET KAW KLX250S'09 Q4 S/A MFLR(042173)
042346 - INST SHEET KAW KX250F'17 PC-4/Q4 MFLRS
042363 - INST SHEET KAW KLX250'18 HEX P-CORE 4/Q4 S/A MFLRS(042362-63)
042368 - INST SHEET KAW KX450F'19 PC4/Q4 MFLRS
043325 - INST SHEET SUZ RMZ250'10 PC-4/Q4 (043239-043242)
043326 - INST SHEET SUZ RMZ450'11 PC-4/Q4 MFLR (043311-314)
043345 - INST SHEET SUZ RMZ250'13 HEX PC-4.1/Q4 (043342-45)
043363 - INST SHEET SUZ RMZ450'11 PC-4/Q4 MFLR (043311-314)
044387 - INST SHEET YAM YZ250F'10-13 HEX Q4 (044387)
044388 - INST SHEET YZ450F'10 PC-4/Q4 MFLRS(044333, 044336)
044398 - INST SHEET YAM WR450F'12 PC-4/Q4 MFLRS
044413 - INST SHEET YAM YZ450F'14 FACT-4.1 RCT MFLRS (04405-12)
044426 - INST SHEET YAM YZ450F'14 FACT-4.1 RCT MFLRS (04405-12)
044435 - INST SHEET YAM RAPTOR 700'15 P-CORE 4 HEX S/A MFLR
044437 - INST SHEET WR250R/X'08 PC-4/Q4 MFLR (044270,044271)
044442 - INST SHEET YAM YZ450F'18 PC-4/Q4/FACT-4.1 RCT MFLRS (04441-47)
044452 - INST SHEET YAM YZ250F'19 PC-4/Q4/FACT-4.1 RCT MFLRS (044451-57)
045442 - INST SHEET FACT-4.1 RCT SPIRAL RING REMOVAL
045442 - INST SHEET FACTORY 4.1 V2 SLIP-ON MFLR ASSEMBLY-KTM450SXF'07
045522 - INST SHEET BETA 450RR'11 PC-4/Q4 MFLRS (045344/424)
045556 - INST SHEET KTM250-450SXF'07-14 HEX PC-4/TI PC/Q4 (045553-045556)
045590 - INST SHEET KTM250-450SXF'15-16 FE HEX PC-4/Q4 MFLR
045627 - INST SHEET KTM250-450SXF'18-19 FE HEX PCORE 4 SLIP-ON MFLR
045627 - INST SHEET FACT-4.1 RCT SPIRAL RING REMOVAL
045646 - INST SHEET KTM250XCF'20 F4.1 RCT SLIP-ON MFLR
Make Model Year Make Model Year
BETA 350RR 20 BETA 390RR 20
BETA 390RR 20
BETA 430RR 20 BETA 480RR 20
BETA 480RR 20
    BETA 350/390/430/480RR'20 ANODIZED TITANIUM FACT-4.1 RCT SLIP-ON MFLR W/R.CARBON CAP   Item ID: 045668 - FACTORY 4.1 RCT TITANIUM ANODIZED SL (Slip-On) W/ CARBON CAP
    For: BETA 350RR 2020

     

    BETA 350/390/430/480RR'20 P-CORE 4 HEX MFLR   Item ID: 045666 - Powercore 4 HEX
    For: BETA 350RR 2020

     

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