Carburetor Needle/Seat Inlet Needle Steel Inlet Needle Steel; Seat Size 0.11 in.; Adjustable; SPECIFICATIONS: WARNING CA Proposition 65: Yes FEATURES: Operation Is Simple Steel Inlet Needle Adjustable Steel-tipped inlet needles are necessary when using exotic racing fuels or alcohol or when using benzene or acetone additives. A .097 inch seat size should be used for small four barrel carburetors, a .110 inch seat size should be used for Carburetors up to 735 CFM, larger seat sizes should be used with Carburetors 750 CFM and larger. The following steel inlet needle and seat assemblies are available from Holley. 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 Exhaust, NOS Nitrous, Weiand, Earl's Performance Plumbing, or Diablosport - Holley products can give you the edge you need over the competition.