would the white brothers silencer give me any power gains on my 300ex or is there a better silencer i could find for under 280....and noise level doesnt rly matter to me

 

WB E-series Pro Mega is your best bet...like i said in your other post...4-7 power gains...for under 300 bucks thats the one i would get...they look and sound sick...my friend had on one his old 300ex with the headers too and loved it...was very very happy with it...if i had a 300ex thats the sileners i would get...

 

how much more of a power gain would i get with the header

 

Probably at least an extra 2 horsepower because even if you have a silencer it still can't flow any more exhaust until it gets to the silencer, so your best bet would be to get the whole system

 

with the full system thats where your gonna see most of your power gains...the sileners can only do so much with the stock hearder..as i see it...mostly sileners just give you a better sound than your stock system, better throttle response, and a little power gain...not a ton but not anything...but if i were you i would waste the $$$ on just sileners if you want to see power gains....