These super short twin slash cut silencers give a very distinctive look. Made from high grade stainless with titanium sleeves they are 100% quality. The weight saving is over 2kg per side and the power increase over 3hp at just under 10krpm. With both db reducers fitted the noise level is only slightly up at 91.8db @ 4850rpm. They are road legal. With them removed they will be quite a bit louder and not very legal at all.