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For over 35 years, the FMF has delivered premium exhaust systems for motorcycle enthusiasts worldwide. FMF always choose the best materials to create their exhaust systems which are considered to be one of the best that you can use on your motorcycle or motocross bike..
Show all products from FMF. Here are your choices to choose from and why. We offer our Hi-Flo and Powerbomb headers either in stainless steel or titanium. Our stainless steel headers offer you a lower priced header with increased durability compared to our titanium versions, because of the material and its lower costs and MIG and TIG welding. Don't let the lower price fool you into thinking they won't perform as well as the titanium versions though.
These are modeled identical to the titanium headers and use the same CNC benders to insure proper fit every time. Since titanium is a higher grade metal, these headers are priced higher compared to our stainless steel versions.
You don't get more exotic then titanium. Our Hi-Flo header is an upgrade to your stock header. We've taken the stocker header an improved it to the point that we're not drastically changing the powerband or losing power over stock.
On some models, like the YZ we alter the routing so that it's tucked into the bike better so that it's less vulnerable to damage and so that you can change the oil filter without having to loosen or remove it.
The Powerbomb chamber has two functions. One it acts like a pre-muffler to knock down the sound level a bit and two increases power by increasing the rate in which the header can flow. When the exhaust enters the chamber, it expands and then cools which causes it to contract.
This expansion and contraction actually speeds up the exhaust through the header. It also has a scavenging effect on the exhaust port, which will let a fresher air and fuel charge into the cylinder for a more efficient burn. This also creates even more power. Don't be fooled by larger diameter headers increasing power everywhere. With a loss of backpressure at the exhaust port you will lose low end power in order to gain top end.
Both the Hi-Flo and Powerbomb headers increase power throughout the entire power band. The science behind the Megabomb header may be our greatest engineering accomplishment to date. You can bolt on a Megabomb with an existing FMF Racing slip on for as much as a 3hp boost, plus the Megabomb actually reduces noises levels by as much as 1. You will see the majority of your power increases on the low to mid range as well as broadening out the mid to top end over stock.
This works great for tight woods riding, supercross type tracks or for someone looking to boost that bottom end. Keep this in mind. This is true to a certain extent until you get out of the tuning range of the motor. A cc motor will only flow so much exhaust. For more top end, add more discs and for more bottom end, run less discs with the quietcore installed.
Gold Series refers to the plated finish of our pipes. All our pipes other than the SST and ATV pipes are nickel-plated, which end up turning a slight gold color over time from the temperature, hence the name. Fatty pipes are designed to give the engine an all around power increase. We are not drastically altering the power band of the bike.
This pipe will appeal to most people that are happy with the stock power band and just looking for more useable power everywhere. Our Gnarly pipes have been developed and tested for the off-roader in mind. With thicker 18g steel construction, it will take the punishment you can throw at it. This pipe will shift and increase the power band so that it comes on sooner, pulls harder through the mid and smoothes out the high RPM surge.
This was once called our Torque pipe, but it did not include the thicker steel construction. The Rev pipe is designed for that rider that keeps it wide open.
This pipe takes a little from the bottom and puts it up on top to keep it screaming. We offer this pipe for 80cc and cc's only and are recommended for higher skilled riders, as the power can be a little pipey. For outdoor high-speed tracks, this works awesome.
This is probably one of the most asked questions. The rumor mill has created several very creative meanings that we dare not share.
We do not necessarily look for the fastest riders as much as we look for whom we feel would be the best representatives for FMF Racing. FMF support vehicles are always on the move. For the latest schedule, click here. This is a common question we get here at FMF Racing. You cannot add a spark arrestor screen to any existing 2-stroke silencer. The reason for this is because all of our 2-Stroke silencers that have spark arrestors, are built into the actual core as a "Turbine Dampening System" that is welded to the core and is U.
Forestry Approved. The three silencers we offer with spark arrestors are the Turbinecore's, Q Series and the Q-Stealth's. For the majority of the time you will not need to use your existing stock OEM muffler clamp, unless stated in the directions for select models. We do recommend a light bead of high temp silicone with every application around the inner diameter of the mid pipe that slips over your header. We do not recommend or guarantee you try to match it to a stock muffler.
For the most part, yes. We build our mufflers to be fully interchangeable between all of our products and stock components. This way you don't have to worry about something not fitting down the road. We recommend you call one of our customer service representatives at before you make any purchases to verify the fitment on your machine. As we all know sound is a major issue, which can effect whether or not we continue to enjoy our sport without offending others. Also your system performs best and will last longer when the silencer is properly maintained.
A two stroke running a little rich on the oil ratio will saturate the silencing media very quickly. On a big bore four frequent high speed riding will also shorten the life of the media.
From water-cooled engines for electronic fuel pumps and lightweight aluminum chassis. It is precisely the technical challenges that force FMF to constantly evolve and come up with new innovative ideas. FMF great commitment and broad portfolio has been the foundation of their success story and helps them maintain their place as the world's leading supplier of exhaust systems.
The goal of the FMF has always been to produce the best and most high-performance exhaust systems, all to give their customers the best possible driving experience.
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