Thrashed: FMF Racing Factory 4.1 Titanium Exhaust System

FMF Racing Factory 4.1 Titanium Exhaust System
Bolting the 4.1 system up to our Suzuki LT-R450 was like Romeo and Juliet: They were meant for each other. This system mounted up without having to use any shims, spacers or Lou Ferrigno-like muscle to manhandle into place. Nope, every bolt hole lined up perfectly. This system is titanium and weighs as light as a feather, saving a few unneeded pounds. Coupled with a stainless steel header pipe, it was mounted and ready to go in no time at all. Speaking of the header pipe, the boys over at FMF Racing have developed theirs slightly different from the competition. The FMF system incorporates a 4- to 5-inch expanded section of the header pipe called the PowerBomb. The PowerBomb not only increases the velocity of the exhaust gases but also provides some exhaust damping to help lower the sound output. I know sound output is a big concern at most parks, but traditional methods tend to restrict the flow of exhaust thus reducing overall power output. Not this system!

For the LT-R450, they include a Power Chip to bypass the stock map in the ECU. The Power Chip is specific to the LT-R and allows you to utilize a hidden race map; however, jetting information is available for all of the other brands' ATVs at FMF's website. When we fired up our FMF-equipped project bike, I was blown away by the exhaust note. This system sounds like an all-out race machine. It was not ear piercing like some systems but spit out a roar like there was no tomorrow. Anxious to feel the power we headed straight for the track. There was a noticeable amount of low-end gain. The front end of our LT-R450 would come up at will. To my surprise, the same amount of low-end power extended all the way up through the rpm range. For $599.99, our LT-R is even more of a blast to ride whether in the tight turns or pinned through the straights. -Chris Burke

Bottom Line: FMF hit the nail on the head with the Factory 4.1 Titanium Exhaust System. From the exhaust note to the easy installation and power output, we loved everything about it.

FMF Racing: 310/631-4FMF; www.fmfracing.com