Unless you roll your arches they will rub. I have the same wheels etc and theres no room for spacers. Maybe 10mm at a push but I reckon the rears will still hit. I'd also paint the bungs in the k1 black or remove them as I think they waste the look of the exhaust, as, whats the point of having huge cans with a tiny little hole coming out of it? Thats what a normal punter would think. Of course we know the reason but I would paint them black to disguise them