One of the most important components of any nitrous system, NOS filter fittings feature an aircraft type stainless steel mesh filter element to keep contaminants from attacking the solenoid and plugging the jets. All NOS nitrous systems include Nitrous and Fuel Filters.
Holley Performance Products has been the undisputed leader in fuel systems for over 100 years. Holley carburetors have powered every NASCAR® Sprint® Cup team and nearly every NHRA® Pro–Stock champion for four decades. Holley's products include performance fuel pumps, fuel injection, intake manifolds & engine dress–up products for street performance, race and marine applications. As a single solution, or partnered with products from other Holley companies, Hooker Headers, Flowtech Headers, NOS, Weiand, or Earl's, Holley products can give you the edge you need over the competition.