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. The new NOS high pressure Billet Aluminum Filters (#15550 & #15552) feature a precision billet aluminum body and a cleanable stainless steel mesh filter element that has 10 times the filtering area of a standard filter. All NOS nitrous systems include Nitrous and Fuel Filters.
Holley 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. Now, Holley EFI is dominating the performance world as well as our products for GM's LS engine. Holley's products also include performance fuel pumps, 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 Nitrous, Weiand, Earl's Performance Plumbing, or Diablosport - Holley products can give you the edge you need over the competition.