FMF Factory 4.1 Slip-On Exhaust with Stainless Mid-Pipe

Was $374.99 - $449.99 $337.99 - $404.99 You save up to $45.00 (10%)

Rating 5.00 of 5 (2 Reviews)

This Product Qualifies for Free Shipping

Please select your bike

Please select a Color
color is unavailable in this size

In Stock
Unavailable

Qty:

Product Information

FMF Factory 4.1 Slip-On Exhaust with Stainless Mid-Pipe

Titanium slip-on muffler with stainless steel midpipe; same muffler as Factory 4.1 system. Available in natural titanium or blue anodized finish. Fits stock or FMF header.

Features:
  • Exclusive proprietary Chamber Core technology
  • Factory Forward Engineering centralizes mass, improves handling
  • Titanium canister and endcap with a stainless steel mid-pipe
  • Made from premium quality American materials
  • Performance tuning inserts and spark arrestor module available
  • Meets AMA sound requirements on most models; inserts available for others


  • *Note: KTM Models do not include mid pipe.


    Click Here for Additional Exhaust Information

    **Closeouts are limited to stock on hand**
  • Item # 6465
  • SKU #
  • Mfr. Part #

FitmentView All

Can-Am Models

  • DS450 : 2008–2011
  • DS450 X : 2008
  • DS450 X mx : 2009–2011
  • DS450 X xc : 2009–2011

Honda Models

  • CRF150R : 2007–2010, 2012–2016
  • CRF150R Expert : 2007–2009, 2012–2016
  • CRF250R : 2004–2005
  • CRF250X : 2004–2009, 2012–2013, 2015, 2017
  • CRF450R : 2005–2010
  • TRX700XX : 2008–2009

Kawasaki Models

  • KFX400 : 2003–2007
  • KFX450R : 2008–2011
  • KFX450R Monster Energy : 2009
  • KLX450R : 2008–2009
  • KX250F : 2004–2008
  • KX450F : 2006–2008

KTM Models

  • 400 EXC : 2004–2006
  • 450 EXC-G Racing : 2004–2006
  • 450 MXC : 2004–2005
  • 450 SMC : 2004
  • 450 SMR : 2004–2006
  • 450 SX : 2004–2006
  • 450 SX ATV : 2009–2010
  • 450 XC ATV : 2008–2010
  • 505 SX ATV : 2009–2010
  • 525 EXC-G Racing : 2004–2006
  • 525 MXC-G Racing : 2004–2005
  • 525 SMC : 2004
  • 525 SMR : 2004–2005
  • 525 SX : 2005–2006
  • 525 SX Racing : 2004–2005
  • 525 XC : 2006
  • 525 XC ATV : 2008–2009
  • 525 XC-G Racing : 2007
  • 690 Enduro : 2008–2009
  • 690 Enduro R : 2014
  • 690 SMC : 2008–2010

Suzuki Models

  • QuadSport Z400 : 2003–2009, 2012–2013
  • RM-Z250 : 2004–2006
  • RM-Z450 : 2008–2012

Yamaha Models

  • Raptor 350 : 2005–2013
  • Raptor 700 : 2013–2015
  • Raptor 700R : 2006–2009, 2011–2015
  • Raptor 700R Anniversary : 2006
  • Raptor 700R GYTR : 2007
  • Raptor 700R SE : 2007–2015
  • WR250F : 2003–2009, 2011–2013
  • WR450F : 2007–2009, 2011
  • YFZ450 : 2004–2009, 2012–2013
  • YFZ450 Balance : 2006–2007
  • YFZ450 SE : 2007–2008
  • YFZ450R : 2009–2015
  • YFZ450R SE : 2009–2015
  • YFZ450X : 2010–2011
  • YFZ450X SE : 2011
  • YZ250F : 2003–2013
  • YZ250F Anniv. : 2006
  • YZ450F : 2006–2009
  • YZ450F Anniv. : 2006

Product Reviews 1 - 2 of 2

Overall Rating: 5.00 of 5

(2 Reviews)
5
2
4
0
3
0
2
0
1
0
What Other Riders Are Saying...

Fit

Finish

Durability

Features

Cost Benefit

100% worth the money

Definitively a great muffler. Bought it with the FMF power bomb and gained some mid range and some considerable high power and it just sounds great. Of course, the increase was not huge but it gave me that "extra push" I was searching. The fit on my Yamaha WR250f 2013 was PERFECT. I don't know anything about mechanics and was able to install it in about 30 minutes.

Salvador - June 11, 2014

(New York, NY)

Fit

Finish

Durability

Features

Cost Benefit

AWESOME AWESOME

Definitely worth the money, don't waste your time on the t4 or powercore. The factory 4.1 is pricey but its definitely worth the money. Fits great, looks amazing, sounds beautiful with a deep tone and it also increased my bottom end and mid range power. Don't get me wrong it didn't increase huge amounts of power increase but noticeable power increase on my 2003 yz250f. Now I just can't wait to get the megabomb also.

jesse - January 31, 2013

(redding , CA)