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Fuel System
Your Subaru fuel system includes the fuel pump, fuel injectors, and other important bits like the fuel pressure regulator and fuel rails. These parts work together to delivery the proper amount of fuel to your Subaru engine. If you increase the demand for fuel -- by running more turbo boost, for example, you may need to increase the supply of fuel. Note, though, that if you already have enough fuel capacity, adding larger fuel injectors or a larger fuel pump will NOT increase power in any way.
Also note that the ECU is not able to sense what size fuel injectors have been installed. if you upgrade the injectors to a larger size, you have to tell the ECU using custom ECU tuning.
AEM Drop-In Fuel Pump Upgrade 2008+ STI/2008-2014 WRX/2005-2009 LGT/OBXT
AEM's 320lph E85-compatible high flow in-tank fuel pump features robust internal construction that is designed to withstand the low lubricity characteristics of ethanol and methanol fuels, and is tested to work...
DeatschWerks DW65C Drop-In Fuel Pump Upgrade 2008-14 WRX / 2008-17 STI
The DeatschWerks DW65 drop-in replacement fuel pump delivers higher flow WITHOUT the need for modifying your stock fuel pump housing. The DW65 flows 265 liters per hour (LPH), and is...
DeatschWerks 300c Drop-In Fuel Pump Upgrade 2008+ STI/2008-2014 WRX/2005-2009 LGT/OBXT
The DeatschWerks 300c pump is a 340 lph fuel pump that is a drop-in replacement for your stock pump, delivering higher flow WITHOUT the need for modifying your stock fuel pump...
DeatschWerks 300c Drop-In Fuel Pump Upgrade BRZ/FR-S/2015+ WRX
The DeatschWerks 300c pump is a 340 lph fuel pump that is a drop-in replacement for your stock pump, delivering higher flow WITHOUT the need for modifying your stock fuel pump...
DeatschWerks DW200 Drop-In Fuel Pump Upgrade 2002-2007 WRX/STI
The DeatschWerks DW200 drop-in replacement fuel pump delivers higher flow WITHOUT the need for modifying your stock fuel pump housing. The DW200 flows 255 liters per hour (LPH), and is E85-compatible....
DeatschWerks DW300 Drop-In Fuel Pump Upgrade 2002-2007 WRX/STI, 2005-2007 LGT/OBXT
The DeatschWerks DW300 drop-in replacement fuel pump delivers higher flow WITHOUT the need for modifying your stock fuel pump housing. The DW300 flows 340 liters per hour (LPH), and is E85-compatible. Pump...
Walbro Fuel Pump Upgrade 2002-2007 WRX/STI
This drop-in replacement fuel pump from Walbro supplies up to 255 liters per hour of fuel flow. It's a must if you go with a larger turbocharger. It's made in...
DeatschWerks Top Feed Fuel Injectors for WRX/STI
Deatschwerks injectors use state-of-the-art Bosch, Denso, and Hitachi cores. They are carefully cleaned, flow tested, and matched. Each set comes with a flow rate and properties sheet. Note that 2005-06 Legacy...
DeatschWerks Side Feed Fuel Injectors for WRX/STI
Deatschwerks injectors use factory Hitachi and Denso cores, so they have the latency and impedence characteristics of stock injectors. They are carefully cleaned, flow tested, and matched. Each set comes...
Cobb Tuning/Injector Dynamics Top Feed 1300cc Fuel Injectors
COBB Tuning is excited to release an all new 1300cc fuel injector, designed in partnership with Injector Dynamics and Bosch Motorsport. This collaboration has given us the ability to offer...
Injector Dynamics Injectors
Injector Dynamics is renowned worldwide for manufacturing the highest performing and most tuner preferred fuel injectors available on the market today. Lesser quality fuel injectors are typically flow tested only...
COBB Subaru Fuel Pressure Regulator Kit 2008+ STI
Are you annoyed with that 2800 rpm stumble you get while driving your 2008+ Subaru STI? Wish you could easily fix it? COBB has the answer: The COBB Subaru 2008+...
Fuel Pump Assembly 2008-2014 STI
This 175 liter-per-hour fuel pump is big enough for most street turbo upgrades (think 20G or equivalent) you'd put on a 2008+ WRX or 2005-09 Legacy GT. We sell the...
In-Tank Fuel Filter 05-07 WRX and 2004-2006 WRX STI
Most 2.5 liter turbo Subaru cars have a fuel filter in the fuel tank, stacked on top of the fuel pump. This one fits all 2005-2007 WRX, plus 2004-2006...
In-Tank Fuel Filter 2007 WRX STI
Most 2.5 liter turbo Subaru cars have a fuel filter in the fuel tank, stacked on top of the fuel pump. This one fits only 2007 WRX STI.
Underhood Fuel Filter 2002-2004 WRX
Genuine Subaru part. Fits all 2002-04 WRX, and some 2005 WRX's. (Not for 2.5 liter cars -- they don't have an under-hood fuel filter.)
Subaru Fuel Tank Gasket 2008-2014 WRX/STI
This OEM gasket seals the top of the fuel tank access where the pump goes in. Fits all 2008-2014 WRX and STI.
Aeromotive Side Feed Fuel Rail 2004-2006 STI
Aeromotive's bolt-on fuel rails are CNC-milled from 6061-T6 aircraft quality aluminum.. Flow-through, top feed design eliminates hydraulic fluctuation. Plated steel mounting brackets included for direct, bolt-on installation. -8 AN ORB (O-Ring...
Aeromotive Top Feed Fuel Rail 2002-2014 WRX/2007+ STI
Aeromotive's bolt-on fuel rails are CNC-milled from 6061-T6 aircraft quality aluminum.. Flow-through, top feed design eliminates hydraulic fluctuation. Plated steel mounting brackets included for direct, bolt-on installation. -8 AN ORB (O-Ring...
Subaru Fuel Pump Housing Gasket 2002-2007 Impreza/WRX/STI, 2003-2008 Forester XT
This OEM gasket seals the top of the fuel tank access where the pump goes in. Fits all 2002-2007 WRX and STI, plus 2003-2008 Forester XT.
Top Feed Conversion Kit 2004-2006 STI
Side feed fuel injectors are annoying! There are limited replacement sizes, and they are expensive. We also think that when you get to very large injector sizes, top feed injectors...
DeatschWerks Top Feed Conversion Kit 2004-2006 STI
This kit converts from side feed to top feed fuel injectors. You get fuel rails, Deatschwerks fuel injectors, mounting brackets, and install hardware. Features: -6 AN in and out Fully Anodized in...
Top Feed Conversion Kit No TGV Housings 2004-2006 STI
Side feed fuel injectors are annoying! There are limited replacement sizes, and they are expensive. We also think that when you get to very large injector sizes, top feed injectors...
Injector Dynamics Plug-and-Play Wiring Harness Set
These wiring harnesses are used to allow plug-and-play installation of Injector Dynamics fuel injectors on Subaru cars. Also fits Nissan, Mitsubishi, Mazda, and Toyota cars. Set of four harnesses. Injectors...
Subaru OEM Fuel Pressure Regulator 2002-2007 WRX and STI (Top-Feed Injectors)
Original equipment Subaru fuel pressure regulator. Fits 2002-2007 WRX, and 2007 STI. Does NOT fit 2004-2006 STI.
Subaru Fuel Line Update Kit 2002-2003 WRX
This kit is the official Subaru Technical Service Bulletin (TSB) hardware to fix leaking fuel lines on the bugeye WRX cars. The kit is intended to remedy an issue where...
Cobb Flex Fuel Complete Package 2008-2014 WRX, 2008+ STI
Harness the power of ethanol, while maintaining ease of ownership and the flexibility to fuel up where and when you want. Flex Fuel is a combination of hardware and software...
Cobb Flex Fuel Ethanol Content Sensor Kit 2008-2014 WRX, 2008+ STI
Harness the power of ethanol, while maintaining ease of ownership and the flexibility to fuel up where and when you want. Flex Fuel is a combination of hardware and software...
Cobb Fuel Pressure Sensor Kit 2008-2014 WRX, 2008+ STI
The Cobb fuel pressure sensor kit is a plug-and-play solution for the age-old problem of not knowing whether you have enough fuel pressure. As you modify your car and the fuel requirements...
Cobb Tuning Top Feed 1050x Fuel Injectors
The COBB 1050x Fuel Injectors provide increased fuel flow while maintaining stock idle and driveability with proper tuning. Wanting to run E85 or need more fueling for your specific application? The...
Cobb Flex Fuel Ethanol Sensor Kit 2015+ WRX
A complete plug and play solution enabling users to convert their supported Subaru WRX to a Flex Fuel configuration without losing factory compensations. This is the easiest to use and...
AEM Drop-In Fuel Pump Upgrade 2002-2007 WRX / STI
AEM's 320lph E85-compatible high flow in-tank fuel pump features robust internal construction that is designed to withstand the low lubricity characteristics of ethanol and methanol fuels, and is tested to work...
Injector Dynamics Top Feed Conversion Kit 2004-2006 STI
Convert your side-feed injector WRX STI to top-feed for better choice of injectors, better/smoother fuel flow, and improved safety. Injector Dynamics provide the absolute best fuel injectors available, and have...
Injector Dynamics Top Feed Conversion Fuel line Kit 2004-2006 STI
This fuel line kit from Injector Dynamics is the perfect companion to the Injector Dynamics top-feed conversion kit. The kit includes 6-AN braided fuel lines, billet aluminum adapter fittings, and...
Cobb Flex Fuel Complete Package 2004-2007 STI, 2006-2007 WRX
Harness the power of ethanol, while maintaining ease of ownership and the flexibility to fuel up where and when you want. Flex Fuel is a combination of hardware and software...
Cobb Flex Fuel Ethanol Content Sensor Kit 2004-2007 STI, 2006-2007 WRX
Harness the power of ethanol, while maintaining ease of ownership and the flexibility to fuel up where and when you want. Flex Fuel is a combination of hardware and software...
Cobb Fuel Rail Kit 2008+ STI
Cobb Subaru Fuel Rails are constructed of 6061 Billet Aluminum and feature black anodizing with a laser etched COBB logo. Each rail comes with -8 AN to -6 AN adapters...
Cobb Fuel Rail Line Kit 2008+ STI
The Cobb Subaru Fuel Rail Line Kit is designed to be used along with the Cobb Fuel Rail Kit. All lines are pre-assembled with double-swivel sport crimp style hose ends...
Cobb Fuel Pressure Regulator for Fuel Rail Kit 2008-2017 STI
The Cobb Subaru Fuel Pressure Regulator Kit is a plug-and-play solution that is simple to install. It requires no cutting of factory hoses and is multi-fuel compatible. This kit includes...
Cobb Stage 3+ Flex Fuel Power Package 2011-2014 STI Sedan
Harness the power of ethanol, while maintaining ease of ownership and the flexibility to fuel up where and when you want. Flex Fuel is a combination of hardware and software...
Cobb Fuel System Package + Flex Fuel 2008-2017 STI
The Subaru Fuel System Package + Flex Fuel kit includes: Fuel Rails Fuel Rail Line Kit Fuel Rail Line Kit to Flex Fuel Fuel Pressure Regulator for Fuel Rail Kit...
Cobb Fuel System Package 2008-2018 STI
This is a complete fuel system upgrade for 2008+ Subaru WRX STI. For the 2015+ cars, this unlocks all the performance the factory turbo can deliver. The kit also mitigates...
Cobb Tuning Fuel Rails/Line Kit Package 2008-2017 STI
All lines are pre-assembled with double-swivel sport crimp style hose ends and ready for installation. Stainless reinforced PTFE line with black covering has a 3" minimum bend radius which...
Subaru Fuel Pump Cover Gasket 2002-2007 Impreza/WRX/STI, 2003-2008 Forester XT
This OEM foam gasket is for the metal cover that provides access to the top of the fuel tank and the fuel pump. Over time the foam gasket breaks down and...
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