{"product_id":"radium-engineering-bmw-fuel-hanger-feed-w-microglass-filter","title":"Radium Engineering In-Tank Fuel Hanger Feed System w\/ Microglass Filter | BMW | Surge Tank | Anti-Starvation | 20-0475-05","description":"\u003ch2\u003eRadium Engineering In-Tank Fuel Hanger Feed System w\/ Microglass Filter – BMW | 20-0475-05\u003c\/h2\u003e\n\u003cp\u003eRadium Engineering’s in-tank fuel hanger feed system with microglass filter for BMW — a complete in-tank surge tank solution that mounts inside the OEM BMW fuel tank using the factory fuel pump hanger location. The OEM BMW fuel pump acts as a lift pump, continuously feeding the Radium surge tank mounted inside the fuel tank. Surge pumps (not included — sourced separately to match your fuel flow requirements) then feed the engine from the surge tank. Eliminates fuel starvation under high-G cornering, hard acceleration, and low-fuel-level conditions that would unport a standard in-tank pump. The microglass filter on the surge tank inlet provides high-flow pre-filtration to protect aftermarket surge pumps from fuel tank debris. Designed for high-power BMW builds running upgraded fuel systems where the OEM fuel delivery architecture cannot support the required fuel flow.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e⚠️ Fitment note: Verify exact chassis compatibility using Radium Engineering’s fitment guide (radiumengineering.com) before ordering. This is a high-value fuel system component — confirm your specific BMW model, chassis code, and production date are compatible with P\/N 20-0475-05 before purchasing.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003eHow the System Works\u003c\/h3\u003e\n\u003cp\u003eStandard in-tank fuel pumps are vulnerable to fuel starvation in high-performance applications — under sustained high-G cornering, hard acceleration, or when the fuel level is low, fuel sloshes away from the pump inlet, allowing the pump to momentarily draw air. On a high-power engine running at the limit of its fuel system, even a brief starvation event causes a lean condition that can damage the engine. Baffled fuel tanks and modified sumps are one solution; in-tank surge tanks are another — and for BMW applications where tank modification is undesirable, the Radium in-tank system is the cleanest approach.\u003c\/p\u003e\n\u003cp\u003eThe Radium hanger system works as follows: the OEM BMW fuel pump (retained) acts as a low-pressure lift pump, continuously filling the Radium surge tank mounted inside the factory fuel tank. The surge tank maintains a constant supply of fuel regardless of fuel level or vehicle attitude. High-flow aftermarket surge pumps mounted inside the surge tank then supply the engine at the pressure and flow rate required for the build. Because the surge pumps draw from a contained reservoir rather than the open tank, fuel starvation is eliminated even at low fuel levels and under sustained lateral G-forces on track.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIn-Tank Surge Tank:\u003c\/strong\u003e Mounts inside the OEM BMW fuel tank using the factory hanger location — no external surge tank, no external plumbing running through the chassis. The cleanest possible surge tank installation for a BMW build\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Lift Pump Architecture:\u003c\/strong\u003e Retains the factory BMW fuel pump as a lift pump feeding the surge tank — no need to remove or bypass the OEM pump. The factory pump and fuel level sender are retained\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMicroglass Filter:\u003c\/strong\u003e High-flow microglass pre-filter on the surge tank inlet — finer filtration than a standard fuel sock filter, protecting high-flow aftermarket surge pumps from fuel tank debris and particulate contamination. Critical for pump longevity on a build running expensive high-flow surge pumps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSurge Pumps Not Included:\u003c\/strong\u003e The hanger feed system is the mounting and filtration infrastructure — surge pumps are sourced separately to match your specific fuel flow requirements (injector size, fuel type, target power level). Radium Engineering offers compatible surge pump options\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRadium Engineering Quality:\u003c\/strong\u003e Radium Engineering is one of the most respected fuel system specialists in the US performance market — their in-tank hanger systems are used on high-power builds from track cars to competition vehicles where fuel system reliability is not negotiable\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEliminates Fuel Starvation:\u003c\/strong\u003e Surge tank architecture completely eliminates the fuel starvation risk that exists with standard in-tank pump setups under cornering, acceleration, and low-fuel conditions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat’s Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eRadium Engineering in-tank fuel hanger feed assembly\u003c\/li\u003e\n\u003cli\u003eMicroglass pre-filter\u003c\/li\u003e\n\u003cli\u003eMounting hardware\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSurge pumps not included — sourced separately\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFitment\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eVerify exact fitment using Radium Engineering’s official fitment guide at radiumengineering.com before ordering.\u003c\/strong\u003e The Radium BMW hanger series covers multiple BMW chassis and model years — confirm that P\/N 20-0475-05 is the correct part for your specific BMW model, chassis code (E46, E9x, F-series, etc.), and production date. Incorrect hanger selection will result in a part that does not fit the factory fuel tank hanger opening.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eThis is a high-power fuel system component intended for race, track, and high-performance street builds. Installation requires draining the fuel tank and working with fuel system components — all applicable fire safety precautions must be observed. Professional installation by a qualified fuel system technician is strongly recommended. Surge pumps must be sourced and sized separately for your specific fuel flow requirements. A fuel system upgrade of this nature typically requires supporting modifications including a fuel pressure regulator, AN fuel lines, injector upgrades, and ECU tuning — consult with a qualified fuel system specialist before purchasing.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Radium Engineering\u003c\/li\u003e\n\u003cli\u003ePart Number: 20-0475-05\u003c\/li\u003e\n\u003cli\u003eFilter Type: Microglass Pre-Filter\u003c\/li\u003e\n\u003cli\u003eSystem Type: In-Tank Surge Tank \/ Fuel Hanger Feed\u003c\/li\u003e\n\u003cli\u003eOEM Pump: Retained as lift pump (OEM pump not included)\u003c\/li\u003e\n\u003cli\u003eSurge Pumps: Not included — sourced separately\u003c\/li\u003e\n\u003cli\u003eApplication: BMW — verify chassis fitment at radiumengineering.com\u003c\/li\u003e\n\u003cli\u003eWeight: 3.8 lbs\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Radium Engineering","offers":[{"title":"Default Title","offer_id":51270339821735,"sku":"RAD20-0475-05","price":362.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0555\/8344\/1063\/files\/e9de17e7237b5bfff31d86ee44bb0eceL_9b48f18a-f3d6-404d-836c-1ad75d5696a4.jpg?v=1787877782","url":"https:\/\/www.straightsiximports.com\/en-us\/products\/radium-engineering-bmw-fuel-hanger-feed-w-microglass-filter","provider":"Straight Six Imports","version":"1.0","type":"link"}