New Exhaust from FMF. Designed to meet the AMA requirements for 2011.
FMF - Factory 4.1 Complete System with RCT
- All new incorporating the latest in Resonance Chamber Technology
- Patented core shape lowers sound level while maintaining maximum power output
- Patented canister shape increases internal volume for more sound absorbing material
- Patented chamber design to enhance and refine exhaust pressure
- Factory Forward Engineering centralizes mass and is less prone to crash damage
- Tuned exhaust with optimized core specifications for each application
- Innovative rear endcap for simple installation of tuning tip inserts or spark arrestor
- Comes With 94db Insert.
REVIEW SNAPSHOT®
by PowerReviews(based on 11 reviews)
Ratings Distribution
100%
of respondents would recommend this to a friend.
Pros
- Easy to use (8)
- Lightweight (7)
- Durable (6)
Cons
Best Uses
- Racing (10)
- Off-road (7)
- Motorsports:
- Competitive cyclist (7), Casual rider (6), Motorcycle enthusiast (4)
Reviewed by 11 customers
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Displaying reviews 1-10
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Pros
Cons
Best Uses
- Racing
Comments about FMF - Factory 4.1 Complete System w/ Resonance Chamber Technology:
Fitted to 2012 SX-F 250. Big increase in power across the range but most noticible in bottom end. Looks and sounds awesome!!!
- Motorsports:
- Competitive Rider
Pros
- Durable
- Easy To Use
- Lightweight
Cons
Best Uses
- Racing
Comments about FMF - Factory 4.1 Complete System w/ Resonance Chamber Technology:
First time buying from BTO, and won't be the last. Pipe came next day, bolted on perfect. Low to mid range punch is awesome over the stocker and much lighter. My 2011 KX 450F roars like a factory bike.
Pros
Cons
Best Uses
- Racing
Comments about FMF - Factory 4.1 Complete System w/ Resonance Chamber Technology:
easy install performs great looks real good have been with fmf since the 70s
- Motorsports:
- Competitive Rider
Pros
- Durable
- Easy To Use
- Lightweight
- Versatile
Cons
- expensive
Best Uses
- Long Rides
- Motocross
- Off-Road
- Racing
- Supercross
Comments about FMF - Factory 4.1 Complete System w/ Resonance Chamber Technology:
great exhaust, it looks sick, sounds great. it gives my 2009 kx450f that extra push down low.
- Motorsports:
- Competitive Rider, Motorcycle Enthusiast
Bottom Line Yes, I would recommend this to a friend
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Pros
- Durable
- Easy To Use
- Lightweight
- Versatile
Cons
Best Uses
- Off-Road
Comments about FMF - Factory 4.1 Complete System w/ Resonance Chamber Technology:
so happy with this purchase, definitely recommend it, will be buying everything from BTO!
- Motorsports:
- Casual Rider, Competitive Rider, Mechanic, Motorcycle Enthusiast
Pros
- Durable
- Easy To Use
- Lightweight
Cons
Best Uses
- Off-Road
- Racing
Comments about FMF - Factory 4.1 Complete System w/ Resonance Chamber Technology:
I put this on my 2011 yzf250 and it fitted perfectly. Went on super easy and runs perfectly.
- Motorsports:
- Casual Rider, Competitive Rider, Motorcycle Enthusiast
Pros
- Easy To Use
- Great power gains
- Lightweight
Cons
- Titanium is soft
Best Uses
- Long Rides
- Off-Road
- Racing
Comments about FMF - Factory 4.1 Complete System w/ Resonance Chamber Technology:
Put this on my 2011 KX250f. Looks awesome and helped the power all across the band.
- Motorsports:
- Casual Rider, Competitive Rider, Mechanic, Motorcycle Enthusiast
Pros
- Durable
- Easy To Use
- Lightweight
Cons
Best Uses
- Off-Road
- Racing
- Upgrade
Comments about FMF - Factory 4.1 Complete System w/ Resonance Chamber Technology:
I put this pipe on my 2010 rmz450 and its great accept the megabomb header has started to melt my boot after 1 day of riding. Apart from that its a good pipe, looks and sounds great.
- Motorsports:
- Casual Rider
Pros
- Easy to install
- Great Look
- Power
Cons
Best Uses
- Off-Road
- Racing
- Upgrade
Comments about FMF - Factory 4.1 Complete System w/ Resonance Chamber Technology:
I typically ride tracks and was looking for some low end performance gains. this exhaust works great on my KXF450, awesome power down low. jumps out of corners are easy with this exhaust.
- Motorsports:
- Casual Rider
Pros
- Durable
- Easy To Use
- Lightweight
- Tough
Cons
Best Uses
- Racing
Comments about FMF - Factory 4.1 Complete System w/ Resonance Chamber Technology:
Great system defiantly gives allot more power down low in the bike makes allot more aggressive but still easy to ride.
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