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.
- Operation Is Simple
- Steel Inlet Needle
Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
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Holley has been the undisputed leader in fuel systems for over 100 years. Holley carburetors powered every Monster Energy NASCAR Cup team and nearly every NHRA Pro-Stock champion for four decades. Now, Holley EFI products power these cars and are dominating the performance world. Holley products for GM's popular LS engine are dominating the LS scene as well. Holley's products also include performance fuel pumps, intake manifolds and engine dress-up products for street performance, race and marine applications. As a single solution or partnered with products from other Holley companies we can give you the edge you need over the competition!
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Holley Inlet Needle Steel 6-500-2: