{"product_id":"radium-fpd-r-fpd-xr-inline-fuel-pulse-damper-kit-1","title":"Radium FPD-R\/FPD-XR Inline Fuel Pulse Damper Kit","description":"\u003cdiv class=\"jdm-product-content\" style=\"text-align: left;\"\u003e\n\u003ch2\u003eRadium FPD-R \/ FPD-XR Inline Fuel Pulse Damper Kit\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSold as pulse dampers only — no fittings included.\u003c\/strong\u003e Each FPD features female 8AN ORB ports on the inlet and outlet, so adapter fittings are required to connect your fuel line (see \u003cstrong\u003eFittings — Sold Separately\u003c\/strong\u003e below).\u003c\/p\u003e\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 Inline Fuel Pulse Damper absorbs these oscillating pulses via an internal diaphragm, stabilising fuel pressure throughout the RPM range. Particularly effective with high-flow injectors and boosted applications using a 1:1 rising-rate FPR.\u003c\/p\u003e\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\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\u003ch3\u003eFPD-R vs FPD-XR — Which to Choose?\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eFPD-R (Range) — Green top, 1.98\" tall\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\u003cp\u003e\u003cstrong\u003eFPD-XR (Extra Range) — Black top, 2.60\" tall\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\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\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 are 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\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing:\u003c\/strong\u003e Anodised aluminium, 0.69\" centre bore\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePorts:\u003c\/strong\u003e 3\/4\"-16 UNF (8AN ORB) inline inlet\/outlet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSensor port:\u003c\/strong\u003e 1\/8\" NPT female — for fuel pressure gauge or sensor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting:\u003c\/strong\u003e M6 bolts\/nuts — mountable at any angle including inverted\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiaphragm:\u003c\/strong\u003e Gasoline and alcohol (E85) resistant\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSeals:\u003c\/strong\u003e Viton O-rings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKit Includes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAnodised\/laser engraved aluminium top (R = green, XR = black)\u003c\/li\u003e\n\u003cli\u003eAnodised aluminium body with female 8AN ORB ports (no fittings — see below)\u003c\/li\u003e\n\u003cli\u003eGasoline and alcohol (E85) resistant diaphragm\u003c\/li\u003e\n\u003cli\u003eStainless steel M6 mounting bolts and nuts\u003c\/li\u003e\n\u003cli\u003e4mm ID rubber vacuum hose\u003c\/li\u003e\n\u003cli\u003eVacuum hose Y-fitting\u003c\/li\u003e\n\u003cli\u003e1\/8\" NPT plug\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\n\u003ch3\u003eFittings — Sold Separately\u003c\/h3\u003e\n\u003cp\u003eEach FPD has a female 8AN ORB (3\/4\"-16 UNF) port on both the inlet and outlet, so you'll need a matching adapter fitting for each side. Choose the fitting(s) below to suit your fuel line, or the ORB plug if you need to cap a port. Part numbers below are Radium Engineering.\u003c\/p\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; font-size: 0.95em;\"\u003e\n\u003cthead\u003e\n\u003ctr style=\"background-color: #111; color: #fff;\"\u003e\n\u003cth style=\"padding: 8px 12px; text-align: left;\"\u003ePart Number\u003c\/th\u003e\n\u003cth style=\"padding: 8px 12px; text-align: left;\"\u003eFitting\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr style=\"border-bottom: 1px solid #ddd;\"\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e14-0151\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e8AN ORB to 6AN Male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #ddd; background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e14-0152\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e8AN ORB to 8AN Male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #ddd;\"\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e14-0153\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e8AN ORB to 10AN Male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #ddd; background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e14-0294\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e8AN ORB to 8.5mm Barb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #ddd;\"\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e14-0694\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e8AN ORB to 10mm Barb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #ddd; background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e14-0367\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e8AN ORB to 5\/16\" SAE Male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"border-bottom: 1px solid #ddd;\"\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e14-0368\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e8AN ORB to 3\/8\" SAE Male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"background-color: #f9f9f9;\"\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e14-0150\u003c\/td\u003e\n\u003ctd style=\"padding: 8px 12px;\"\u003e8AN ORB Plug\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003chr style=\"margin: 20px 0; border: 0; border-top: 1px solid #000;\"\u003e\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\n\u003cp data-jdm-brand-link=\"true\" style=\"text-align: left;\"\u003e\u003ca href=\"\/collections\/radium-engineering\"\u003eBrowse more Radium Engineering parts at JDM Mods NQ\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Radium","offers":[{"title":"FPD-R Inline Damper","offer_id":67697800184115,"sku":"20-0199","price":169.0,"currency_code":"AUD","in_stock":true},{"title":"FPD-XR Inline Damper","offer_id":67697800216883,"sku":"20-0200","price":179.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0838\/1471\/1603\/files\/20-0199_33fb3f5c-c968-4bb2-973d-dad759ff4923.jpg?v=1791870680","url":"https:\/\/jdmmodsnq.com\/products\/radium-fpd-r-fpd-xr-inline-fuel-pulse-damper-kit-1","provider":"JDM Mods NQ","version":"1.0","type":"link"}