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FMF
Factory 4.1 PowerBomb System
$539.99 
Lowest Price Guarantee
MSRP $599.99-899.99
Customer Rating:  


Item Availability status
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Product Description
Complete system with titanium PowerBomb header and midpipe. Race proven reliability testing, high temp multi-layer packing material and exclusive repack maintenance indicator.

Features:
  • The lightest full system available
  • Natural or Anodized Blue Titanium Silencer
  • Superior power and performance – horsepower improved throughout RPM range
  • Features exclusive proprietary Chamber Core and Power Bomb technology
  • Factory Forward Engineering centralizes mass, improves handling
  • Titanium muffler with titanium endcap, midpipe and PowerBomb header
  • 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

    • Click Here for Additional Exhaust Information
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Customer Reviews
Average Rating -  Based on 2 Review(s)
Fit   4.5
Features   4.5

Finish   5.0
Cost Benefit   4.5

Durability   4.0
Overall   4.5
Latest Reviews
Fit   5.0
Finish   5.0
Durability   5.0
Features   4.0
Cost Benefit   5.0
Overall   4.8
jon vancouver,  BC great! Works great on my KX450, maybe (this message is for the guy with the WR) you shouldn’t have bought a Yamaha, you or your dealer probably installed it wrong then messed up the jets, don’t blame FMF for your mistakes. I use this setup on all my bikes, works absolutely great. Your WR has some issues as with you and your dealer pal. BUY THIS SETUP!
Fit   4.0
Finish   5.0
Durability   3.0
Features   5.0
Cost Benefit   4.0
Overall   4.2
Tim DeMik Dallas,  TX Bike runs terribly with this full system I have had the (factory 4) pipe on my WR450 for over a year and the bike has never run properly. I have had the Yamaha dealer try to tune it but it still runs terribly. I would think that FMF would have done testing before selling this
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