DeatschWerks X2 Series Fuel Pump Module for Subaru WRX & STI

Engineered for High-Horsepower Subaru Builds

The factory Subaru fuel system works well at stock power levels, but once boost, injector size, and ethanol content increase, the OEM setup becomes a major restriction.

The DeatschWerks X2 Series Fuel Pump Module is designed to support:

• High-boost turbocharged applications
• E85 and flex-fuel setups
• Larger injector upgrades
• Built engine combinations
• Track, drag, and street performance use

This complete fuel pump module provides improved fuel delivery stability while helping reduce fuel starvation issues under aggressive driving conditions.

DeatschWerks makes a speciality of prime-performance EFI fuel system solutions. DeatschWerks’ roots were established in 2004 by means of providing prime waft drop-in application explicit fitment fuel injectors. DW has developed quite a lot of leading edge fuel system elements which come with in-tank and in-line pumps, surge tanks, fuel rails, fuel filters, pressure regulators, and fuel-explicit lines, fittings, and adaptors.

Vehicle Fitment

The 9-421-7050 X2 Series module is compatible with multiple Subaru models, including:

• 2008–2021 Subaru WRX
• 2008–2021 Subaru STI
• 2008–2018 Subaru Forester
• 2005–2009 Subaru Legacy

Its direct-fit design helps simplify installation while maintaining OEM-style integration.

Dual Pump Capability for Serious Fuel Demand

One of the standout features of the X2 Series module is its dual pump configuration capability, making it ideal for high-output builds requiring significantly increased fuel volume.

Benefits include:

• Increased fuel flow capacity
• Improved fuel pressure stability
• Better support for ethanol fuels
• Scalable fueling for future upgrades
• Reduced risk of lean conditions under boost

For Subaru owners chasing bigger numbers, fuel delivery consistency is critical. Because “it leaned out a little” is usually tuner language for “your pistons are now modern art.”

Complete Fuel System Solution

Unlike basic pump upgrades, the X2 Series module offers a more complete fueling solution by replacing the factory pump assembly with a performance-oriented module engineered specifically for demanding applications.

The module is designed to work well with:

• Aftermarket fuel injectors
• Flex fuel systems
• Larger turbochargers
• Standalone or tuned ECU setups
• High-performance fuel rails and regulators

This makes it an excellent choice for enthusiasts planning future upgrades instead of repeatedly revisiting the fuel system every six months.

Built by DeatschWerks

DeatschWerks Official Website has established itself as one of the leading manufacturers of high-performance fuel system components for modern sport compact and performance vehicles.

Known for extensive testing and vehicle-specific engineering, DeatschWerks products are widely trusted across:

• Time attack builds
• Street performance vehicles
• Drag racing platforms
• Rally and autocross applications
• High-horsepower turbocharged setups

The X2 Series Fuel Pump Module continues that reputation by offering Subaru owners a reliable, scalable fueling upgrade designed for modern performance demands.