Delivery took almst a month.. And also the delivery service didnot provide home delivery even after paying delivery charges I had to collect it from their office.. But the product was very good.. I fitted it on my bike and there is absolutly no chain noise as before.. You can only hear the engine roar.. a long term review is notpossible but it is a good purchase to invest in.. Also it looks unique and premium.. Even the mechanic who fitted it on the bike was telling me the product is of good quality and will last longer..also they provided a balacave with the purchase thnk you for that..