These oil filters were originally designed and manufactured for the high demand in the race industry. They are gaining popularity due to the durable construction as well as the easy and fast removal. The canisters themselves are thicker than the competition, adding strength and reducing the threat of damage. Consisting of a cellulose bound with phenolic compound resin which surrounds the inside core, providing strength and reducing the risk of a collapsed filter. This resin compound is the glue that binds the fibers and at the same keeps the pores. The resin compound is brought to full strength, by the curing process in which it goes through. K&N Performance filters feature an anti-drain back valve when needed, preventing oil from draining into your vehicles crankcase. The heavy-duty walls help hold up against high pressure, which is why the K&N Performance Gold oil filters are ideal for the race car breed. | K&N High Performance Oil Filter HP-7042