Radium Engineering FHST, black canister with wiring and hardware laid out

Radium Engineering Fuel Hanger Surge Tank for Audi R8 / Lamborghini Huracan / Gallardo 2010-2023

Radium Engineering SKU: RAD20-0860
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Details

BrandRadium Engineering
SKURAD20-0860
Manufacturer Part Number20-0860

Product Information

An in-tank fuel hanger surge tank that drops into the left-hand fuel tank opening and adds a separate pump circuit for port injectors or a custom fuel system. The factory pump, filter, regulator and direct injection system stay as they are, so the port injection fuel no longer passes through the factory restrictor fittings. Fuel stays trapped around the added pump to prevent starvation at high power. The fuel pump is not included.

Specifications

Type In-tank fuel hanger surge tank (FHST)
Fitment Notes 5.2L V10 engines only; mounts in the left-hand fuel tank opening and keeps the factory fuel pump system and fuel level sensors
Warranty 1 year limited

This part fits:

Year Make Model Submodel
2010-2012, 2014-2015, 2017-2018, 2020-2023 Audi R8 Base, GT, GT Spyder, Performance, Performance RWD, Performance RWD Spyder, Performance Spyder, Plus, Plus Spyder, RWS, Spyder
2015, 2018 Lamborghini Huracan LP610-4, Performante
2012-2014 Lamborghini Gallardo LP550-2 Spyder, LP560-2

How is the surge tank kept full?

  • Three sources fill it: the left-hand factory venturi jet pump (flow tested to 302 LPH max), the returning fuel from the added regulator through a diverter that prevents foaming, and three one-way fill valves at the bottom rated at 355 LPH each (1,065 LPH total).

Can the surge tank hold more fuel?

  • Yes. The FHST extension add-on fits a 39mm deeper canister that holds an extra 0.2 L (7 oz), with longer tubing and a longer pump bracket so the pump inlet stays at the bottom.

Does it replace the factory fuel pump?

  • No. The factory pump keeps feeding the direct injection system; the surge tank has its own pump outlet and return inlet for the port injection side.

Shipping

  • In stock orders typically ship within 1 to 3 business days.
  • Standard, expedited, and overnight options at checkout.
  • Oversized items ship by freight and take longer.
  • Special order items follow a lead time we confirm with you individually before the order is committed.
  • Backordered items ship as soon as stock lands. Lead times are manufacturer estimates and can change. Contact us for current ETAs.
  • Need to cancel? Email us right away. Cancellations are not guaranteed once an order is in process. In-stock orders cancel free before they ship; a 6% fee applies only to confirmed backorders and special orders.
  • International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.

Returns

  • 30 days from delivery to request and ship back a return on new, uninstalled items in original packaging with all hardware.
  • Standard returns: 8% restocking fee on the item price before tax and shipping. Shipping is not refunded in either direction. All waived if the item is defective or we made the error.
  • Fitment guaranteed: select your vehicle above, or confirm fitment with us in writing before you order. If the part shows as a fit and it is wrong, the return is on us, even after installation. Otherwise, installed or used parts cannot be returned.
  • Final sale: special orders, coilovers, electronics, engine internals, turbochargers, superchargers and turbo kits, unless defective or we sent the wrong item.
  • Product images may be representative. The SKU and specifications in the listing are what ships.
  • Email us for return authorization before shipping anything back.

Full details: Shipping Policy · Returns & Refunds · Warranty
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