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XAT Lexus IS300 GS300 DIY Return Fuel System Set-Up Package

XAT Lexus IS300 GS300 DIY Return Fuel System Set-Up Package

Please note that push-lok fittings may be sent out instead. If you need something different, please let us know.

When doing any boost install to the Lexus IS300 or GS300, one must take absolute consideration of the limits of the engine, fuel system, engine management and operating environment, before you find yourself with a blown-up engine.

There is much discussion on how much power the stock fuel system, engine management system, etc., the engine can handle. It is our "base" experience that on the factory small fuel injectors you can run about 285 RWHPsafely. Safely would be defined as injector duty cycle limit not exceeding 85% with an air fuel ratio under boost of 11.5 to 12.0 to 1 on good quality premium unleaded fuel. I know people have made 375rwhp on factory injectors, but this number is our opinion of "not safe", not everyone's.

Not every customer requires the complete Stage 1.5 Accessory Kit, and frankly, some just want to swap their IS300 from the returnless factory style fuel system to the "required" Return Fuel System, which is a must for any boosted application in the IS300. Without this, you cannot successfully install a proper fuel pressure regulator.

I said all that, to say this. We have this Fuel System Set-up Package which converts your factory fuel system to a return style fuel system. All parts are in this kit. Figure an afternoon to do the install for an experienced mechanic.

This kit contains the following:
Return Fuel Line Package:

FueLab 1:1 Rising Rate Fuel Pressure Regulator -6 AN

100 psi rated fuel line kit

All AN fittings

Fuel pressure gauge (mounts to FPR)

Other fuel pumps are available at extra cost for those needing more fuel flow!

If you are building a dual or triple feed fuel setup for your GS/IS, please contact us as we have a separate kit for you to fit your needs

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XAT Racing
  • $440
    • SKU
    • Weight
      10 lbs
  • Manufacturer
    XAT Racing
  • Fuel Type
    Gasoline, E85 Compatible
  • Fuel Pump
    Yes, Hellcat 525 lph + fitment kit, Yes, Walbro E85 450 lph + fitment kit, Yes, AEM E85 340 lph kit, None, already have one

Most product ships from either the manufacture or largest wholesale location to pass the saving to you. Most orders will ship via UPS, as we will be able to provide the best rates and have had the least issues when using UPS.

IF YOU DO NOT LIKE THE AUTOMATED SHIPPING CALCULATOR'S RATES, PLEASE CONTACT US AND WE CAN GET YOU A BETTER ONE! Especially for anyone outside the USA, please contact us with a list of parts you'd like to order, and where you are located.

We accept the following payment methods:

Also Venmo and unmarked nonsequential dollar bills

  • Fitment Type
    Vehicle Specific
Toyota/LexusLexus IS/Altezza1998-2005IS300 2JZGE 3.0 I6 JCE10
Toyota/LexusLexus GS/Aristo1998-2005 S1602JZGE/2JZGTE 3.0 I6 (98-05) JZS160/JZS161

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