Header diameter increases

[T250]

I've got some Black Widow headers but managed to get hold of some original chrome ones for my K2, the reason being purely for aesthetics the aftermarket pipes discoloured very quickly and looked tat, can't say I noticed any difference in performance, but I am an old fart and don't push on too hard these days...

[grog]

T250, no good to me if they discolour, I'll forget about that idea. Thanks

[gsxbarmy]

T250, no good to me if they discolour, I'll forget about that idea. Thanks

Having no inner pipe @grog they will "bronze" almost immediately, probably most of the way down the header as well.