Originally Posted by
stevenr
Proper 500 airboxes don't come up very often and are changing hands at over £500 these days.I sold one last year and I couldn't believe it went up to £400 on ebay.
I've a Pipercross foam filter on mine and it seems to fit better than the big K&N so might be worth looking at different styles of filter maybe too?
Cant remember what the difference is between 500 and std Cosworth air boxes are, I know there is but it escapes me