EXHAUST
Natural
Blue Anodized
TITANIUM POWERCORE
SLIP-ON MUFFLERS
Incredible horsepower gains with 99 dB sound level or less
Titanium construction with American TIMETAL ® canister and rear end cap
Designed with FMF’s exclusive Factory Forward Engineering – lowering the center of gravity and centralizing mass
Utilize advanced multistage packing material and a Hi-Flo stainless steel formed front end cap and mid-pipe
PowerCore 4 HEX features a unique canister design; internal shape of core uses Hi-Flo technology that provides enhanced sonic evacuation for
higher flow and increased power
Removable spark arrestor included and optional 94 dB insert available
separately; see page 22
Natural or blue anodized muffler body
SUG. RETAIL ............................................................ $379.99 BODY
FITS MODEL
DESCRIPTION
P ART #
FITS MODEL
DESCRIPTION
P ART #
HONDA
YAMAHA
CRF250R 04-05
Natural
1821-0393
WR250F 07-14
Natural
1821-0579
CRF250R 11-13
HEX design, natural
1821-1552
Blue anodized
1821-0580
CRF250X 04-09/12-17
Natural
1821-0393
YZ250F 06-09
Natural
1821-0579
CRF450R 05-08
Natural
1821-0394
Blue anodized
1821-0580
KAWASAKI
YZ250F 10-13
HEX design, natural
1821-1573
KX450F 12-15
HEX design, natural
1821-1561
HEX design, blue anodized
1821-1574
SUZUKI
WR450F 07-11
Natural
1821-0579
RMZ450 11-12
Natural
1821-1527
Blue anodized
1821-0580
RMZ450 13-15
HEX design, blue anodized
1821-1567
YZ450F 06-09
Natural
1821-0579
Blue anodized
1821-0580
THE Q SERIES
Q4
SLIP-ON MUFFLERS
The Q series features advanced engineering to precisely locate
baffles and chambers to absorb sound
Less mass to enhance power-to-weight ratio
Quiet power with minimal sacrifice for performance
Q4 slip-on muffler unless noted
Q4
Developed over years of championship off-road racing
Twin-stage core design for lower sound output and extended
life of packing material
Comes standard with spark arrestor
Q4Hex
Q4 HEX
Less sound equals more ground
Meets 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
Made in the U.S.A.
MANUFACTURER NOTE: FOR CLOSED COURSE COMPETITION USE ONLY. NOT
INTENDED FOR STREET USE.
FITS MODEL
DESCRIPTION
P ART #
SUG. RETAIL FUEL/AIR
BETA
RR/RS 350/ 400/ 450/ 498/ 520 10-13
Hex spark arrestor muffler
1811-2618
$379.99
X-T rainer 300 15-16
Spark arrestor muffler
1821-1709
179.99
HONDA
CRF150F 03-17
Spark arrestor muffler
1821-0887
319.99 HARDWARE &
CRF150R 07-16
Spark arrestor muffler
1821-0543
379.99 MERCHANDISING
CRF230F 03-17
Spark arrestor muffler
1821-0887
319.99
CRF230L 08-09, CRF230M 09
Spark arrestor muffler
1821-1017
319.99
CRF250L 13-15
Hex spark arrestor muffler
1821-1447
389.99 CROSS
CRF250R 04-05
Spark arrestor muffler
1821-0653
379.99 REFERENCE
CRF250R 06-09
Spark arrestor muffler (single muffler)
1821-0655
379.99
THE Q SERIES continued on next page.
DISCLAIMER: NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES.
SEE PAGE 4 FOR IMPORTANT EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND WARRANTY INFORMATION.
2018 PARTS UNLIMITED OFFROAD