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PowerFiend

FMF exhaust questions.

7 posts in this topic

I sent an email question to FMF about a week ago, and still have not received an answer to the following questions. Can anyone here help me out?

- Differences between the moto and S/X powerbomb headers.

- Weight savings of the ti vs. stainless pb header.

- Differences between the std. and euro Q mufflers.

P.S. Anyone running a powerbomb with the stock muffler and a WB insert? I just bought a 02 WR426 and the header is bent.

thanks.

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I think the differance between the moto and sx is the moto is the stainless and the sx is the ti. the ti pipe is lighter but will dent much easier, if you are rideing where there are rocks buy the stainless. I put the stainless powerbomb with the ti 4 silencer with the quiet insert/spark arrestor on my WR426. it gave me more mid and low end without looseing any on the top. :)

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I think the differance between the moto and sx is the moto is the stainless and the sx is the ti. the ti pipe is lighter but will dent much easier, if you are rideing where there are rocks buy the stainless. I put the stainless powerbomb with the ti 4 silencer with the quiet insert/spark arrestor on my WR426. it gave me more mid and low end without looseing any on the top. :)

How loud is that exhaust combo?

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Ive not had my power core 4 measured but Id say its on the loud side. Around as loud as the stock uncorked WR pipe. sounds way better though! deeper thump.

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I have the Powercore 4 on my 450 and I just installed the quiet insert. It really lowered the noise level but still has a nice sound. Without the insert it is too loud for use on public land. By the way, FMF customer service sucks. I sent them three seperate emails in the last 2 months and not one has been replied to. When I called them with some questions the kid on the phone was clueless about their products.

JD :)

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I have been running the Powerbomb header for years now. It does quieten the bike a bit but not enough to make a significant difference. There are only two problems I have ever had with it and one of them was recently resolved with the aftermarket guard that is out now. the other was that I started running Ty-Davis Signature tanks and I feel that the header is just dangerously close to the right side petcock. It does add a couple of horses and tools up the mid-range a bit. It does however require rejetting from stock to get the maximum benefit.

Bonzai :)

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