FMF FACTORY 4.1 FULL-TITANIUM SYSTEM WITH MEGABOMB HEADER
APPLICATION: Available for most late-model mxers (Tested here on the 2009 KX450F)
OPTIONS: Available with either Megabomb or Powerbomb header. Mufflers available in natural or blue anodized
PRICE: $849.99

KEY FEATURES:
-Made from high quality titanium
-Features exclusive proprietary Chamber Core technology
-94db insert and spark arrestor insert available
-Designed to boost power all throughout the powerband
-Utilizes what FMF calls Factory-Forward Technology to centralize mass and improve handling. Something that not many exhaust companies consider when producing an exhaust system

WHAT WE LIKED:
-Solid construction
-Fitment is excellent
-The full titanium system is much lighter than stock
-Power is improved, giving our 2009 KX450F more grunt down low with a noticeable increase in top-end pull
-Pipe isn't overly loud
-Looks clean when mounted on the bike

WHAT WE DIDN'T LIKE:
-The price is high, however, on the '09 KX450F you do get what you pay for—a high-end exhaust system that produces power and performance gains. FMF also offers slip-on mufflers that we've tested with impressive results

WHAT WE REALLY THINK: If you're looking to get some extra power out of your 2009 KX450F, you should probably consider the FMF Factory 4.1 system with the Megabomb header. It looks good, produces noticeable power gains, and will likely stand up to a lot of abuse—ours has so far. Your hand earned dough will likely not go to waste if you decide to update your bike with this setup.

Visit www.fmfracing.com for more information