AED Needle-and-Seat Assembly Pair 0.110" Orifice — Adjustable Tip with Viton Seals for Holley/Quick Fuel

AED 5110 is a pair of adjustable needle-and-seat assemblies with a 0.110" orifice and Viton seals, built to restore precise fuel metering in Holley and Quick Fuel carburetors.

This replacement pair gives you a direct, high-quality option when repairing or rebuilding carburetors that use a 0.110" orifice. Each assembly is engineered to control float bowl fuel flow with an adjustable tip and durable Viton sealing for resistance to ethanol and common fuels. The parts are sized to fit many Holley and Quick Fuel applications and arrive in a compact package for easy handling and storage.

How does this needle-and-seat assembly fit into my carburetor rebuild?

The AED 5110 units replace worn or leaking needle-and-seat components that regulate fuel entering the float bowl. Properly fitted assemblies prevent flooding and maintain consistent fuel level for stable engine performance. They are intended as direct replacements for compatible Holley and Quick Fuel models that specify a 0.110" orifice.

• Direct-replacement dimensions for 0.110" orifice carburetors
• Adjustable needle tip for fine tuning float shutoff
• Viton elastomer resists fuel and ethanol exposure
• Sold as a matched pair for dual-bowl carburetors

What materials and construction choices improve durability?

These assemblies combine precision-machined metal bodies with Viton sealing tips to withstand harsh fuel environments and repeated seating cycles. The metal components provide stable alignment while the Viton resists swelling and degradation from modern fuels. That combination reduces the chance of fuel leakage and premature failure.

• Viton tip for chemical and heat resistance
• Metal valve stem for consistent seating action
• Robust construction suited to high-vibration environments
• Matched pair ensures balance in dual-bowl setups

How do I adjust and install these needle-and-seat assemblies?

Installation is straightforward for anyone familiar with carburetor teardown: remove the float bowl, extract the old seat, and press-install the new unit into the bowl. Adjust the needle tip according to the carburetor manufacturer’s float height specification, then confirm no leaks at the seating point. Replace gaskets and reassemble using recommended torque and securing methods.

• Remove float bowl and old seat following OEM instructions
• Press new assembly squarely into the bore; avoid crossthreading
• Set needle tip/float height per carburetor specs
• Test for leaks before final assembly and engine start

Which engines and carburetor models commonly use this part?

These AED 5110 assemblies suit many performance and replacement applications that accept a 0.110" orifice needle-and-seat, most often found in Holley and Quick Fuel carburetors. Verify compatibility by matching orifice size and seat style to the original parts list or service manual. They are best used where a durable Viton seal and adjustable needle are desired.

• Commonly used in Holley and Quick Fuel carburetor rebuilds
• Fits dual-bowl and single-bowl configurations requiring 0.110" orifice
• Good choice for ethanol-blended fuel systems
• Sold in pairs for synchronized twin-bowl fuel metering

Who is this for: a practical replacement for mechanics, restoration enthusiasts, and performance builders who need a dependable, adjustable needle-and-seat with a 0.110" orifice. If you are repairing or rebuilding Holley or Quick Fuel carburetors and want improved sealing against modern fuels, this AED 5110 pair provides a cost-effective, durable solution that is simple to install and tune.