{"product_id":"radium-fpd-xr-extended-range-fuel-pulse-dampener-3-8-npt","title":"Radium Fuel Pulse Damper - Direct Mount (FPD-R \/ FPD-XR) | 8AN ORB or 3\/8\" NPT","description":"\u003ch2\u003eRadium Direct Mount Fuel Pulse Damper - FPD-R \/ FPD-XR (8AN ORB or 3\/8\" NPT)\u003c\/h2\u003e\n\n\u003cp\u003eInjector opening and closing creates pressure pulses in the fuel rail that can cause unstable fuel pressure, idle surge, and erratic lean AFR spikes (“stumbling”) that are difficult to tune out. The Radium Engineering Direct Mount Fuel Pulse Damper absorbs these oscillating pulses via an internal diaphragm, stabilising fuel pressure throughout the RPM range. Mounts directly onto the fuel rail for best results. Particularly effective with high-flow injectors and boosted applications using a 1:1 rising-rate FPR.\u003c\/p\u003e\n\n\u003cp\u003eRadium FPDs feature a vacuum\/boost reference port — essential for boosted systems running a rising-rate FPR, ensuring correct damper performance at elevated fuel pressures. Compatible with all fuel types including E85 and methanol.\u003c\/p\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eFPD-R vs FPD-XR — Which to Choose?\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eFPD-R (Range) — Green top\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBase static fuel pressure requirement: \u003cstrong\u003e40-70 PSI\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eCompact size — ideal for space-constrained applications\u003c\/li\u003e\n  \u003cli\u003eVacuum\/boost reference line required for boosted applications exceeding 70 PSI dynamic pressure\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eFPD-XR (Extra Range) — Black top\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBase static fuel pressure requirement: \u003cstrong\u003e40-105 PSI\u003c\/strong\u003e\n\u003c\/li\u003e\n  \u003cli\u003eWider response range — Radium recommends the FPD-XR if space permits\u003c\/li\u003e\n  \u003cli\u003eVacuum\/boost reference line not required if maximum fuel pressure does not exceed 105 PSI\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Base pressure = fuel pressure measured with the pump running and NO vacuum line connected to the regulator. Dynamic pressure from a rising-rate FPR outside these ranges is acceptable provided the base static pressure is set within the specified range and the vacuum\/boost reference line is connected.\u003c\/p\u003e\n\n\u003ch3\u003eSelection Examples\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eMitsubishi Evo — 43.5 PSI base, 30 PSI boost, rising-rate FPR:\u003c\/strong\u003e Both FPD-R and FPD-XR suitable. FPD-R requires vacuum\/boost reference line connected.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBMW E46 M3 — 72.5 PSI base, 20 PSI boost, rising-rate FPR:\u003c\/strong\u003e FPD-R not suitable (base exceeds 70 PSI). FPD-XR required.\u003c\/p\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eThread Options\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e8AN ORB:\u003c\/strong\u003e Seals using a Viton O-ring — positive, leak-free seal\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3\/8\" NPT:\u003c\/strong\u003e Seals with tapered pipe threads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eThe FPD can be mounted at any angle including inverted. For best results, mount directly onto the fuel rail.\u003c\/p\u003e\n\n\u003ch3\u003eKit Includes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAnodised and laser engraved aluminium top (R = green, XR = black)\u003c\/li\u003e\n  \u003cli\u003eAnodised aluminium body with male threads (8AN ORB or 3\/8\" NPT per selection)\u003c\/li\u003e\n  \u003cli\u003eStainless steel hardware\u003c\/li\u003e\n  \u003cli\u003e4mm ID rubber vacuum hose\u003c\/li\u003e\n  \u003cli\u003eVacuum hose Y-fitting\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e20-0179 — Radium Direct Mount Fuel Pulse Damper (FPD-R \/ FPD-XR, 8AN ORB or 3\/8\" NPT)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\n\u003ch3\u003eWhy Radium Engineering?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e✅ Manufactured in the USA to motorsport-grade tolerances\u003c\/li\u003e\n  \u003cli\u003e✅ CNC-machined billet aluminium components built for performance and longevity\u003c\/li\u003e\n  \u003cli\u003e✅ Trusted by high-power build tuners and race teams worldwide\u003c\/li\u003e\n  \u003cli\u003e✅ Vacuum\/boost referenced — correct performance at elevated fuel pressures on boosted builds\u003c\/li\u003e\n  \u003cli\u003e✅ Compatible with E85, pump petrol, methanol, and all exotic fuel types\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Radium Engineering","offers":[{"title":"Default Title","offer_id":48591104671976,"sku":"20-0179","price":174.99,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0354\/8135\/4376\/files\/20-0179_2bb99573-a467-4f79-97de-5bc0bcaf137b.jpg?v=1779943365","url":"https:\/\/www.platinumracingproducts.com\/en-kw\/products\/radium-fpd-xr-extended-range-fuel-pulse-dampener-3-8-npt","provider":"Platinum Racing Products","version":"1.0","type":"link"}