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FmF exhaust "How its made"

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so it's a ported expansion port

What it is is a resonator. What it really does is damp the activity of pressure waves to cause the engine to "see" the header as having a variable or undefined length. That spreads power, but won't add any necessarily.

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"Yet delivers up to 30% more power" that's obviously true

 

Starts working as soon as they apply the FMF decal to it.

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How we lighten your wallet.

 

True, but consider the basic dilemma faced by the manufacturer who needs to build a pipe for a wide range of potential applications and motor configurations while at the same time somehow not make things worse for any of them. It is a very tall order and my guess is, it is very difficult to fill. One pipe for one bike is always easier to get right. It just cost more.

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True, but consider the basic dilemma faced by the manufacturer who needs to build a pipe for a wide range of potential applications and motor configurations while at the same time somehow not make things worse for any of them. It is a very tall order and my guess is, it is very difficult to fill. One pipe for one bike is always easier to get right. It just cost more.

 

 

thats a good way to look at it

add contending with noise restrictions

and usfs

 

but at the same time... they are pretty far off.  a jemco literally makes a boatload more power.

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