man, i looked in to a breather, and they dont do jack, people have tested them on other forums and said there is no change what so ever. they only cause dramas with oil coming out the tube and leaking. i'd suggest keep your valve covers on.
there are heaps of mods you can do. check my mods page to see wot i have done.
Mods Page
there are heaps of mods you can do. check my mods page to see wot i have done.
Mods Page