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  FMF EXHAUST SYSTEMS AND SLIP-ON MUFFLERS FOR YAMAHA 4-STROKES

TI 4 Slip-On Muffler
  FACTORY 4.1™ SLIP-ON MUFFLER
  • Factory 4.1 muffler available in natural or blue anodized titanium with end caps
  • The lightest mufflers available
  • Superior power and performance – horsepower improved throughout the rpm range
  • Features exclusive proprietary Chamber Core
  • Factory forward engineering centralizes mass, improves handling
  • Made from premium quality American TIMETAL® materials
  • Customize performance and sound output with optional inserts including U.S.F.S. approved spark arrestors
  • Meets AMA sound requirements of 94 dB with optional inserts
TITANIUM POWERCORE
  • 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
  • Utilizes advanced multistage packing material and a Hi-Flo stainless steel formed front end cap and mid-pipe
  • Removable spark arrestor included and optional 94 dB insert available separately
  • Natural or blue anodized muffler body
THE Q SERIES 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
  • Developed over the 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
Q4 TI
  • Developed over years of championship off-road racing
  • Max sound output 96 dB; most models below 94 dB
  • American TIMETAL® canister and end caps
  • Comes standard with spark arrestor
POWERCORE 4 SA
  • Hi-Flo end cap boosts all-around performance
  • Computer designed and dyno tested for every 4-stroke application
  • Enhanced sonic evacuation delivers a higher flow of exhaust gases which increases power
  • A stainless steel mid-pipe mates to the computer-designed rear can for lightweight durability
  • Round perforated steel inner cores make for optimum flow, using Hi-Flo technology
  • FMF’s exclusive cross-weave internal packing provides longevity and maximum sound dispersion
  • Elliptical aluminum can offers strategic sizing for superior performance
  • Optional Quiet Core insert will provide a decrease in sound level if desired
  • Features a screen-type spark arrestor that is approved by the U.S.F.S. and does not interrupt exhaust flow or performance
FACTORY 4™ MUFFLERS
  • Combines the huge weight of savings of titanium with the performance traits gleaned from FMF’s association with factory motocross teams
  • Thousands of hours of both track and dyno time have resulted in power gains averaging just under 20%
  • Made from military grade titanium that is light and durable – in most cases the Ti 4 is 50% lighter than stock
 		 
Application Chart

Quantity Item / Item Code Price
EXHAUST FAC 4.1 YZ/WR250
1820-0241 		$799.95
EXHAUST ANOD 4.1 YZ/WR250
1820-0242 		$799.95
EXHAUST FAC 4C YZ/WR250
1820-0243 		$899.95
EXHAUST FAC 4.1 YZ/WR450
1820-0244 		$799.95
EXHAUST TI 4.1 YZ/WR450
1820-0245 		$799.95
EXHAUST FAC 4C YZ/WR450
1820-0246 		$899.95
EXHAUST PC4/SS TTR125
1820-0248 		$143.95
EXHAUST FACT4.1 YZ450 06
1820-0310 		$799.95
EXHAUST AD FACT4.1 YZ450
1820-0311 		$799.95
EXHAUST FACT4.1C YZ450 06
1820-0312 		$899.95
EXHAUST FACT4.1 YZ250F
1820-0313 		$799.95
EXHAUST AD FACT4.1 YZ250F
1820-0314 		$799.95
EXHAUST 4.1C YZ250F
1820-0315 		$899.95
EXHAUST PC4 SYS TTR50
1820-0316 		$143.95
EXHAUST PC4S/A SYS TTR50
1820-0317 		$159.95
EXHAUST 4.1/STN TTR125
1820-0502 		$239.95
EXHAUST 4.1 YZ450F/250F
1820-0530 		$799.95
EXHAUST AN4.1 YZ450F/250F
1820-0531 		$799.95
EXHAUST 4.1C YZ450F/250F
1820-0532 		$899.95
EXHAUST 4.1 PBMB YZ250F
1820-0616 		$799.95
EXHAUST AN4.1 PBMB YZ250F
1820-0617 		$799.95
EXHAUST 4.1C PBOMB YZ250F
1820-0618 		$899.95
EXHAUST 4.1 YZ/WR250F
1820-0619 		$849.95
EXHAUST AN4.1 YZ/WR250F
1820-0620 		$849.95
EXHAUST 4.1C YZ/WR250F
1820-0621 		$949.95
EXHAUST 4.1 MBOMB YZ250F
1820-0622 		$679.95
EXHAUST AN4.1MBOMB YZ250F
1820-0623 		$679.95
EXHAUST 4.1C MBOMB YZ250F
1820-0624 		$759.95
EXHAUST 4.1 MBOMB YZ450F
1820-0625 		$849.95
EXHAUST AN4.1MBOMB YZ450F
1820-0626 		$849.95
EXHAUST 4.1C MBOMB YZ450F
1820-0627 		$949.95
EXHAUST 4.1 MBOMB YZ450F
1820-0628 		$679.95
EXHAUST AN4.1 MBMB YZ450F
1820-0629 		$679.95
EXHAUST 4.1C MBOMB YZ450F
1820-0630 		$759.95
EXHAUST PC4 W/HDR TTR110
1820-0739 		$143.95
EXHAUST PC4SA/HDR TTR110
1820-0740 		$159.95
EXHAUST AL4.1/SS HDR TTR
1820-0741 		$199.95
EXHAUST 4.1/SS HDR TTR110
1820-0742 		$239.95
MFLR PC4 S/A TTR250 99-06
1821-0168 		$199.95
MUFFLER Q TTR250 99-06
1821-0169 		$289.95
MUFFLER Q2 S/A YZ/WR250
1821-0270 		$359.95
MUFFLER Q2 S/A YZ400/426
1821-0272 		$359.95
MUFFLER FAC 4.1 YZ/WR250
1821-0274 		$424.95
MUFFLER ANOD 4.1 YZ/WR250
1821-0275 		$339.95
MUFFLER TI 4.1 YZ/WR250
1821-0276 		$499.95
MUFFLER TI4.1 AN YZ/WR250
1821-0277 		$499.95
MUFFLER FAC 4.1 YZ/WR450
1821-0278 		$424.95
MUFFLER ANOD 4.1 YZ/WR450
1821-0279 		$339.95
MUFFLER TI 4.1 YZ/WR450
1821-0280 		$499.95
MUFFLER AN TI4.1 YZ/WR450
1821-0281 		$499.95
MUFFLER FAC 4.1C YZ250F
1821-0310 		$599.95
MUFFLER FAC 4.1C YZ450F
1821-0311 		$599.95
MUFFLER AD TI PC4SA YZ450
1821-0351 		$279.95
MUFFLER AD TI PC4SA YZ250
1821-0352 		$279.95
MUFFLER PC4 SA TTR230
1821-0363 		$199.95
MUFFLER Q TTR230 05-08
1821-0364 		$289.95
MUFFLER TI PC SA YZ/WR450
1821-0365 		$349.95
MUFFLER TI PC SA YZ/WR250
1821-0366 		$279.95
MUFFLER PC4 YZ450F/YZ250F
1821-0578 		$239.95
MUFFLER TI PC YZ450F/250F
1821-0579 		$279.95
MUFFLER AN TIPC YZ450/250
1821-0580 		$279.95
MUFFLER Q4 SA YZ450/250F
1821-0581 		$287.95
MUFFLER Q4 TI YZ450F/250F
1821-0582 		$319.95
MUFFLER S/S 4.1 YZ450/250
1821-0583 		$339.95
MUFFLER AN S/S 4.1 YZ
1821-0584 		$339.95
MUFFLER TI 4.1 YZ450/250F
1821-0585 		$399.95
MUFFLER AN TI4.1 YZ
1821-0586 		$399.95
MUFFLER 4.1C YZ450/250F
1821-0587 		$479.95
MUFFLER Q4SA YZ/WR250
1821-0676 		$287.95
MUFFLER TIQ4 SA YZ/WR250
1821-0677 		$399.95
MUFFLER Q4 SA YZ/WR450
1821-0678 		$287.95
MUFFLER TIQ4 SA YZ/WR450
1821-0679 		$399.95
MUFFLER PC4 YZ/WR250
1821-0680 		$239.95
MUFFLER PC4 YZ/WR450
1821-0681 		$239.95
MUFFLER PC4 WR250R/X 08
1821-0797 		$239.95
MUFFLER Q4 S/A WR250R/X
1821-0798 		$287.95
MUFFLER Q4SA TTR230 05-08
1821-0923 		$231.95
MUFFLER Q4SA TTR250 99-06
1821-0924 		$231.95
MUFFLER Q4SA
1821-0925 		$287.95
MUFFLER Q4SA YZ400F/426FWR400/426F
1821-0926 		$287.95
P-CORE4 S/A TTR90 00-07
FMF040070 		$159.95
P-CORE4 S/A SYS TT125
FMF040071 		$159.95
P-CORE4 SYS TTR90 00-07
FMF040080 		$143.95
TITANIUM-4 RND MUFFLR UNI
FMF040145 		$249.95
P-CORE4 S/A MOD YZ400/426
FMF044013 		$239.95
P-CORE4 S/A YZ250F 01-2
FMF044014 		$239.95
P-CORE4 S/A TTR225 '99-05
FMF044021 		$199.95
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