.120 Trick Hi-Flow Needle & Seat - Each

The .120 Trick Hi-Flow Needle & Seat from Advanced Engine Design is designed for serious carburetor tuners and high-performance engine builders who require maximum fuel delivery precision. This adjustable needle and seat assembly is specifically made to replace OEM restrictive components in Holley and Quick Fuel carburetors, allowing for enhanced fuel flow during aggressive tuning.

Featuring a 0.120 inch orifice diameter and constructed with Viton sealing material, the .120 Trick Hi-Flow Needle & Seat minimizes fuel starvation during high-rpm operation and wide-open throttle transitions. The larger orifice diameter compared to stock components reduces back-pressure in the fuel circuit, helping maintain a consistent float bowl level without hunting or surging.

This component is ideal for carburetor enthusiasts looking to upgrade to larger fuel inlet needles or increase boost pressure on forced-induction platforms, where stock fuel delivery may become a limiting factor. The adjustable design allows for fine-tuning of seat height, providing tuners with control over inlet needle engagement and fuel flow characteristics, which is essential for achieving optimal air-fuel ratios across various load conditions and engine speeds.