NITRAC ultra high performance brake discs are different. They are the only discs available in the European market which have been cryogenically treated to improve the grain structure of the cast iron itself, producing a component which is much, much tougher than an ordinary disc and far more resistant to warping, cracking, flaking, and scoring. NITRAC discs will last 2 to 3 times as long as an equivilant untreated disc and our sports discs are ideal for high performance use on the road or track. NITRAC standard long life heavy duty discs are incredibly economical for high mileage users and are available for both vans and cars.All NITRAC discs come with a full 2 year warranty.