Holley Inlet Needle 6-504 | Viton 0.110" Adjustable High-Flow Racing

Holley Adjustable Inlet Needle with Viton Tip - Part #6-504

Ensure precise fuel level control with this genuine Holley adjustable inlet needle featuring a premium Viton tip. Designed for 0.110" seat size applications, this larger-capacity needle provides superior sealing and fuel shut-off reliability for high-performance and racing carburetors. The Viton material offers exceptional resistance to dirt and debris while conforming perfectly to the seat shape for leak-free operation.

Key Features:

• Viton Tip: Premium synthetic rubber for superior sealing and durability
• 0.110" Seat Size: Larger capacity for high-flow and racing applications
• Adjustable Design: Allows precise fuel level adjustment
• Dirt Resistant: Viton material resists contamination and maintains seal integrity
• Conforming Material: Viton conforms to seat shape for optimal sealing
• Genuine Holley Quality: OEM-grade component for reliable performance

Performance Benefits:

• Provides reliable fuel shut-off to prevent flooding and leaks
• Superior sealing compared to standard rubber needles
• Larger 0.110" size handles higher fuel flow demands
• Resists dirt and debris that can cause leaking
• Maintains consistent fuel bowl level for optimal performance
• Adjustable design allows fine-tuning of fuel level height
• Long-lasting Viton material withstands fuel exposure

Understanding Inlet Needles:

• Function: Controls fuel flow into the carburetor bowl, shutting off when proper level is reached
• Viton Advantage: Synthetic rubber that resists fuel, heat, and contamination better than standard rubber
• Seat Size: Must match your carburetor's needle seat (0.110" is for high-flow applications)
• 0.110" vs. 0.097": Larger 0.110" size flows more fuel for racing and high-performance use
• Adjustable vs. Non-Adjustable: Adjustable needles allow fuel level height changes without bending the float
• Float Operation: Works with float to maintain proper fuel bowl level

Compatible Applications:

• Holley performance carburetors with 0.110" needle seats
• High-flow racing carburetors (Dominator, HP series)
• Applications requiring increased fuel delivery capacity
• Street/strip and competition carburetors
• Replacement for worn or damaged 0.110" inlet needles
• Carburetor rebuilds and overhauls

When to Replace:

• During carburetor rebuild or overhaul
• If experiencing fuel leaking or flooding
• When carburetor won't maintain proper fuel level
• If Viton tip shows wear, damage, or hardening
• After contamination or dirt in fuel system
• As preventive maintenance during carburetor service

Installation Tips:

• Ensure needle seat is clean and undamaged before installation
• Verify you have 0.110" seat size (larger than standard 0.097")
• Check float for proper operation and alignment
• Adjust fuel level according to Holley specifications for your carburetor model
• Test for leaks after installation and adjustment
• Use a fuel pressure regulator to maintain proper inlet pressure (typically 5-7 psi for street, may vary for racing)

Technical Specifications:

• Part Number: 6-504
• Seat Size: 0.110 inches (high-flow)
• Tip Material: Viton (synthetic rubber)
• Type: Adjustable inlet needle and seat assembly
• Compatibility: Holley performance carburetors with 0.110" seats
• Application: High-flow racing and performance carburetors

Fast dispatch from our Perth warehouse. In-store pickup available for local customers.