Fuel Pulse Damper Inline 8an ORB 40-100PSI

The Fuel Pulse Damper Inline 8AN ORB 40-100PSI by Holley is engineered to eliminate fuel system oscillation and pressure spikes that plague high-performance fuel delivery systems. Whether you're running a carbureted hot rod, EFI swap, or forced-induction build, fuel pressure fluctuations create lean conditions, stumble, and inconsistent performance—especially under boost or heavy throttle transitions. This compact inline damper absorbs those pressure pulses at the source, protecting injectors, regulators, and gauges while maintaining stable, consistent fuel delivery across your entire RPM range.

The unit features an 8AN ORB (O-ring boss) inlet/outlet, making it compatible with -8 braided stainless fuel lines and industry-standard adapters. Its 40–100 PSI operating range covers everything from carb systems to modern EFI and turbo applications, with an internal diaphragm design that dampens harmonic vibration without restricting flow. The compact 4.3 x 4.3 x 4.7-inch footprint weighs only 1 pound, allowing flexible mounting under the hood, in the cabin, or along the fuel rail assembly. Holley's reputation for precision fuel system components ensures this damper maintains accuracy under sustained pressure cycles and temperature swings.

This damper is ideal for carb conversions, EFI retrofits, supercharged and turbocharged engines, and any custom fuel system where line length or pump pulsation introduces noise or pressure instability. Install it between your fuel pump and regulator, or anywhere along the rail where you need to smooth out transient spikes. Mechanics and hot rodders consistently report smoother idle quality, cleaner throttle response, and improved driveability when adding a fuel pulse damper to systems prone to pressure flutter. For anyone serious about fuel system integrity and engine consistency, the Holley Fuel Pulse Damper Inline 8AN ORB is a proven, compact solution.