Radium Engineering RA-Series EJ257 Fuel Pressure Regulator Kit, regulator with hoses and fittings laid out

Radium Engineering RA-Series EJ257 Fuel Pressure Regulator Kit - Subaru WRX STI (VA) 2015-2021

Radium Engineering SKU: RAD20-0965
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Details

BrandRadium Engineering
SKURAD20-0965
Manufacturer Part Number20-0965

Product Information

Radium Engineering's RA-Series fuel pressure regulator kit replaces the OEM regulator and damper assembly on the EJ257 WRX STI, installing in the same location and rerouting fuel through the rails before the regulator and back to the tank. The multi-port regulator offers tool-less pressure adjustment through a knob with detents of about 1 psi, a stainless steel return orifice, and a 360 degree swiveling vacuum reference port that the kit moves from the number 4 runner to the intake plenum. A spare 8AN ORB port accepts the optional 20-0386 gauge kit, and four interchangeable 10-32 vacuum fittings are supplied. The regulator is compatible with all gasoline types and alcohol blends including ethanol, methanol, and E85.

Specifications

Type Adjustable fuel pressure regulator kit (RA-Series multi-port regulator)
Engine EJ257 only
Adjustment Tool-less knob, detents of approx. 1 psi
Ports 8AN ORB auxiliary (gauge), 10-32 vacuum reference
Vacuum Fittings Barbed 3/16 in, 3AN male, 1/4 in push-to-connect, plug
Fuel Compatibility All gasoline types; ethanol, methanol, and E85 blends
Includes Regulator, OE fuel line disconnect tool, SAE quick connect to AN adapters, EFI hose and Pushlok hose ends, vacuum hose, fittings and hardware
Part Number 20-0965

Documents: Installation Instructions (PDF)

This part fits:

Year Make Model Submodel
2015-2021 Subaru WRX STI Base
2015 Subaru WRX STI Launch Edition
2015-2021 Subaru WRX STI Limited
2019 Subaru WRX STI S209
2016 Subaru WRX STI Series.HyperBlue
2018 Subaru WRX STI Type RA

Shipping

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  • 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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