Fuel Pulse Damper Inline 8an ORB 40-70PSI

The Holley Fuel Pulse Damper Inline 8AN ORB 40-70PSI (part number 12-1007) is a purpose-built fuel system component designed to eliminate fuel pressure pulsation in high-performance fuel injection systems. This inline damper mounts directly into the fuel supply line to absorb the pressure spikes generated by fuel pump cycles, delivering consistent fuel pressure to the injectors and stabilizing engine response across all rpm ranges.

Built from black anodized aluminum, the damper features dual 8 AN female O-ring inlet and outlet ports for secure, leak-free connections using standard ORB (O-Ring Boss) fittings. The 40-70 PSI pressure rating accommodates carbureted-to-fuel-injected engine conversions and forced-induction applications operating in that pressure band. An integrated 1/8-inch NPT port provides diagnostic gauge access for real-time fuel pressure monitoring. The compact 4.4 x 4.3 x 4.7-inch footprint and lightweight 0.95-pound construction allow flexible installation in engine bays with tight packaging constraints.

This damper is essential for builders tuning carb-to-EFI conversions, street performance builds, and moderate horsepower turbocharged or supercharged engines where fuel line noise and pressure oscillation affect drivability and tune stability. The Holley fuel pulse damper is commonly paired with aftermarket fuel rails, inline regulators, and carburetor-to-injection adapters. Includes all necessary fittings for direct bolt-in installation to AN-equipped fuel systems.