Radium Engineering V2 FPD-XR Extended Range Fuel Pulse Damper, 8AN ORB

Radium V2 FPD-XR Extended Range Fuel Pulse Damper, 8AN ORB

Application: Universal – any 8AN ORB female port (6AN ORB with adaptor)
Part Type: Direct mount fuel pulse damper
Part Number: 20-0777

The Radium FPD-XR 8AN ORB is a direct mount fuel pulse damper that screws into any 8AN ORB female port. Fuel injectors opening and closing create pressure pulses in the fuel rail; the damper's internal diaphragm absorbs them to stabilise rail pressure, which can help cure idle surge – especially with high-flow injectors – and lean spikes that feel like a stumble.

Each Radium damper has a vacuum/boost reference port, which keeps it working at elevated fuel pressures – essential on boosted systems with a 1:1 rising-rate regulator, and on vacuum-referenced systems where pressure drops below 40 psi. The 8AN ORB body seals with an FKM O-ring and swivels after tightening, so the reference port can be clocked 360°.

Key Features

• Pulse Damping: Internal diaphragm absorbs injector pressure pulses
• Vacuum/Boost Reference: Maintains performance at elevated and rising-rate fuel pressures
• Base Pressure Range: 2.8–7.2 bar (40–105 psi) base static pressure
• 360° Swivel: 8AN ORB body swivels after tightening to clock the vacuum port
• Any Orientation: Can be mounted at any angle, including upside down
• Fuel Compatibility: All fuel types, including E85

What's Included

• Anodised, laser engraved aluminium top (XR)
• Anodised aluminium body with 8AN ORB male thread
• Stainless steel hardware
• Rubber vacuum hose, 4mm ID
• Vacuum hose Y-fitting

Optional Parts

• Radium 8AN ORB Female to 6AN ORB Male Adaptor Fitting (14-0600) – adapts the damper to a 6AN ORB female port

Important Notes

• Not for use with mechanical fuel pumps or direct injection high-pressure pumps – the pulses will rupture the diaphragm
• Base pressure is the fuel pressure with the pump running and no vacuum line connected to the regulator; dynamic pressure from a rising-rate regulator may exceed the range only if base pressure is within range and the vacuum/boost line is connected
• If base pressure is 70 psi or lower the XR usually offers no advantage over the FPD-R (20-0776); it does allow running without a vacuum line where rising-rate pressure exceeds 70 psi (never above 105 psi) and pressure never drops below 40 psi under vacuum
• Some systems need more than one damper, and some benefit from a damper on the return line
• Check the space around the port against Radium's damper dimensions
• Installation instructions are available in the Instructions tab

Vehicle Fitment

• Universal – fits any 8AN ORB female threaded port; 6AN ORB ports with the 14-0600 adaptor

If you're unsure whether this will fit your vehicle, contact our team of experts via email at hello@iilumolab.com and send through a few photos of the car for us to verify fitment.

Installation

We always recommend professional fitment for guaranteed satisfaction. If you're wanting a hassle-free installation, feel free to contact our friendly team as we offer installation services in-store at our Melbourne workshop. For more details, contact us here.

Note

Upon receiving the item, please ensure that the part is indeed the correct item you have ordered. This can be achieved by checking labels on the packaging. Please also ensure a proper test fit of the item is conducted prior to paint and/or installation. Returns/Warranty claims will be voided if the item has been tampered with, or is no longer in resalable/new condition.