had my veccy for about a month and have:
a, removed pre cat to get rid of flat spot
b, fitted a k & n panel filter
fitted the filter yesterday almost 2 weeks after doing pre cat and now the flat spot has returned !! (although not as bad as before)
whats going on, do i now need to de-restrict the exhuast gases again
i.e. remus centre section or sports cat? what..