Thinking of adding the FM head pipe to complement My FM107 Build. looks like a nice piece of art. what kind of gains do Ya think I will see... I am sure it will sound even more wicked too...

My stock 2009 head pipe is cat-less now.

 

You might pick up a couple of hp just by changing out the header. Pretty expensive mod for just two ponies!

 

Might also broaden out the peak TQ range.

 

Far cheaper then heads at $1000-1200. heads will net about 10/10. The header should be good for 5/8 for $500. plus it will sweeten up the sound with the Dyno tuned 4" slip ons!!!

 

Won't make much difference, maybe a couple of horsepower or so.

 

If I remember correctly you have the base 107 with the 555 cam? You might only pick up a couple hp/tq that's about it. It does sound very nice I'm running the header pipe with the 4inch slip ons. I'm running the same base 107 and also tuned by Pure powersports lol

 

You might loose about 10 lbs. (Verses stainless steel FM headpipe)
The weight comparison is quite surprising.