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FMF Factory 4.1 Complete Stainless Steel Exhaust

Retail: $299.99
$279.99
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FMF Factory 4.1 Complete Stainless Steel Exhaust - Main
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Product Description

The Factory 4.1 system will give you a noticeable increase in all around power, and also shed some weight from your machine. Superior power on stock and big bore motors and the centralized mass improves handling.

FMF takes fun seriously, so they built the Mini Factory 4.1. This is an all out performance exhaust for play bikes. With the Mini Factory 4.1, you will be the king of backyard motocross and look great doing it!

  • The lightest available.
  • Superior power on stock and big bore motors.
  • Patented Chamber Core for optimum performance.
  • Engineered for compactness and centralized mass.
  • Exclusive mounting design.
  • Easily serviced for re-packing.
  • Customize with tuning inserts and spark arrestor.

Detailed Specifications:

  • Type: System.
  • Construction: Titanium.
  • Finish: Natural.
  • Midpipe: Stainless steel.
  • Spark arrestor: insert (sold separately).
  • Quiet insert: Quiet insert (sold separately).
  • Header construction: Stainless steel.
  • Header type: Hi-Flo.
  • Weight: 3.6 pounds.

Note: For closed course competition use only. Not intended for street use.

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(5)
4.4 out of 5 stars
5 star   3
4 star   1
3 star   1
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“ Great power everywhere gives it a nice sound to it... ”
bikeman110f
“ easy install and sounds great, it added quite a bit of power and had a noticable difference up top bu... ”
ktm185 Location: springfield, IL
1-4 of 5
Overall
Location: Osage Beach, MO
Pipe works but some problems
Bought this pipe for a 2012 KLX110L. It's advertised as being made for the bike, but I suspect it's really made for the older model KLX110. It's easy to install and bolts right up, but when you put the plastic back on, you'll find that the pipe pushes up against the plastic side plate at its front edge. When you ride, it melts the plastic there. In addition because the pipe is completely straight as it runs back, your right boot will get melted against the side of the pipe. Don't think you'd want to ride with just sneakers and shorts on! Sounds good, and there's an obvious improvement in throttle response and acceleration.
Overall
Durability
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Performance
Power
Style
Good Pipe!
Great power everywhere gives it a nice sound to it
Overall
Location: springfield, IL
Good
easy install and sounds great, it added quite a bit of power and had a noticable difference up top but seemed to bog a little down low with the stock jets and airbox
Overall
Location: Eastern Shore, Virginia
Awesome pipe! Very smart purchase.
added more power + increased overall performance.
1-4 of 5
Total Questions (2)
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1-2 of 2
Slungblade 2 years 11 months ago
Will this work on an orion pit bike?
Will this work on an orion pit bike?
MotoSport Staff Expert
2 years 11 months ago Location: Motosport
Sorry we do not carry parts for orion pit bikes.
Answer this Question
boatin59 Over 3 years ago
Does it come with a spark arrester?
MotoSport Staff Expert
Over 3 years ago Location: Portland, OR
This does not include a spark arrestor.
Over 3 years ago
No it comes with just the pipe.
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1-2 of 2
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