Radium 20-0776 FPD-R Direct-Mount Fuel Pulse Damper 8AN ORB (Replaces 20-0176)

Vehicle Fitment

• Universal for EFI fuel rails with female 8AN ORB ports

Fitment Notes

• Replaces Radium 20-0176 (updated Dec 2022)
• Mounts directly to fuel rail--any orientation allowed, ideal in tight spaces
• Not for low-pressure mechanical pump return side
• Works with all fuel types, including ethanol blends
• Choose FPD-R for static base pressure 40-70 psi; see 20-0777 for higher range

Features

• CNC-machined aluminum top and body with anodized finish
• 8AN ORB male threads with Viton O-ring sealing
• Vacuum/boost reference port for rising-rate FPR systems
• 360° swivel cap allows vacuum port orientation after install
• Diaphragm dampens pressure pulses to stabilize fuel rail pressure
• Supports idle surge reduction and smoother high-RPM performance
• Includes stainless steel hardware, hose, and vacuum Y-fitting
• Compatible with E85 and other fuels

Specifications

• Material: anodized aluminum top & body
• Threading: 8AN ORB male
• Static pressure range: 40-70 psi
• Orientation: universal mount (including upside-down)
• Fuel compatibility: gasoline, ethanol blends (E85)
• Replaces old PN 20-0176
• Warranty: standard Radium limited warranty

Included Components

• 1x Radium FPD-R fuel pulse damper (20-0776)
• 1x stainless steel hardware kit
• 1x 4 mm ID vacuum hose with Y-fitting
• 1x installation instructions

Product Description

The Radium 20-0776 FPD-R is a universal direct-mount fuel pulse damper designed to install directly into an 8AN ORB-equipped EFI fuel rail. Engineered to replace PN 20-0176, this damper reduces pressure fluctuations caused by injector opening and closing, stabilizing fuel pressure throughout the RPM range. Its CNC-machined aluminum construction, vacuum/boost reference port, and 360° swivel cap ensure reliable performance and flexible installation even in tight engine bays.

Ideal for boosted applications with rising-rate fuel pressure regulators, the diaphragm isolates pressure spikes and improves idle and throttle response. Compatible with gasoline and ethanol fuels (including E85), and suitable for all mounting orientations, the 20-0776 is versatile and durable. Supplied complete with stainless hardware, vacuum hose, and Y-fitting, it offers a clean factory-like install with Radium's quality assurance and warranty backing.

Fitment is universal for fuel rails with female 8AN ORB ports and is not recommended for low-pressure mechanical pump return lines. Choose the FPD-R version for static base pressure between 40-70 psi; for higher pressure ranges, see Radium 20-0777. Replaces old PN 20-0176 as of December 2022. Not emissions-sensitive.