Collection: Engine Upgrades For Subaru Legacy B4 BL
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DeatschWerks 04-06 STi / 04-06 Legacy GT EJ25 850cc Side Feed Injectors *DOES NOT FIT OTHER YEARS*
Vendor:DeatschWerksRegular price $669.00 USDRegular priceUnit price / per$669.00 USDSale price $669.00 USD -
DeatschWerks 04-06 STi / 04-06 Legacy GT EJ25 1000cc Side Feed Injectors *DOES NOT FIT OTHER YEARS*
Vendor:DeatschWerksRegular price $669.00 USDRegular priceUnit price / per$669.00 USDSale price $669.00 USD -

DeatschWerks 255 LPH In-Tank Fuel Pump w/ 02-07 WRX/STi / 93-07 Impreza / 90-07 Legacy Set Up Kit
Vendor:DeatschWerksRegular price $92.65 USDRegular priceUnit price / per$109.00 USDSale price $92.65 USDSale -

DeatschWerks 340 LPH In-Tank Fuel Pump w/ 02-07 WRX/STi / 93-07 Impreza / 90-07 Legacy Set Up Kit
Vendor:DeatschWerksRegular price $143.65 USDRegular priceUnit price / per$169.00 USDSale price $143.65 USDSale -
Deatschwerks DW420 Series 420lph In-Tank Fuel Pump w/ Install Kit For Forester 97-07 Impreza
Vendor:DeatschWerksRegular price $199.00 USDRegular priceUnit price / per$199.00 USDSale price $199.00 USD -
DeatschWerks 02+ Subaru WRX / 07+ STI/LGT Top Feed Fuel Rail Upgrade Kit w/ 1000cc Injectors
Vendor:DeatschWerksRegular price $619.00 USDRegular priceUnit price / per$619.00 USDSale price $619.00 USD -
DeatschWerks 165 LPH In-Tank Fuel Pump w/ 90-07 Subaru Legacy, 93-07 Impreza Install Kit
Vendor:DeatschWerksRegular price $92.65 USDRegular priceUnit price / per$109.00 USDSale price $92.65 USDSale -
DeatschWerks 02-14 WRX / 07-15 STi / 07-12 LGT EJ20/EJ25 650cc Top Feed Injectors - Set of 4
Vendor:DeatschWerksRegular price $399.00 USDRegular priceUnit price / per$399.00 USDSale price $399.00 USD -
DeatschWerks 02-14 WRX / 07-15 STi / 07-14 LGT Bosch EV14 750cc Injectors
Vendor:DeatschWerksRegular price $439.00 USDRegular priceUnit price / per$439.00 USDSale price $439.00 USD -
DeatschWerks Subaru 02-14 WRX/ 07-14 STI and Legacy GT Top Feed Fuel Rails
Vendor:DeatschWerksRegular price $199.00 USDRegular priceUnit price / per$199.00 USDSale price $199.00 USD -
DeatschWerks 02+ Subaru WRX / 07+ STI/LGT Top Feed Fuel Rail Upgrade Kit w/ 750cc Injectors
Vendor:DeatschWerksRegular price $599.00 USDRegular priceUnit price / per$599.00 USDSale price $599.00 USD -
DeatschWerks 02+ Subaru WRX / 07+ STI/LGT Top Feed Fuel Rail Upgrade Kit w/ 1200cc Injectors
Vendor:DeatschWerksRegular price $699.00 USDRegular priceUnit price / per$699.00 USDSale price $699.00 USD -
DeatschWerks 02-12 WRX / 07-12 STi / 07-12 Legacy GT 1000cc Bosch EV14 Injectors
Vendor:DeatschWerksRegular price $469.00 USDRegular priceUnit price / per$469.00 USDSale price $469.00 USD -
Cometic 100mm Bore MLS Headgasket .040" | Subaru 90-01 Impreza/Legacy 2.0/2.5L (H1631SPK040S)
Vendor:Cometic GasketRegular price $47.38 USDRegular priceUnit price / per$57.59 USDSale price $47.38 USDSale -
HKS Fine Tune Upgraded Timing Belt | Subaru WRX/STI/Legacy GT/Forester XT (24999-AF001)
Vendor:HKSRegular price $286.59 USDRegular priceUnit price / per$290.00 USDSale price $286.59 USDSale -
HKS SSQV4 Blow Off Valve Kit | Subaru WRX (08-14) / Legacy 2.5 GT (05-06) (71008-AF012)
Vendor:HKSRegular price $408.94 USDRegular priceUnit price / per$434.50 USDSale price $408.94 USDSale -
DeatschWerks 05-09 Subaru Legacy GT / 08-14 WRX / 08-21 STI DW430C 430lph Compact Fuel Pump
Vendor:DeatschWerksRegular price $186.15 USDRegular priceUnit price / per$219.00 USDSale price $186.15 USDSale -
DeatschWerks 02-12 Subaru WRX / 07-12 Legacy GT/STI 2200cc Injectors (set of 4)
Vendor:DeatschWerksRegular price $859.00 USDRegular priceUnit price / per$859.00 USDSale price $859.00 USD -
DeatschWerks 02-14 Subaru WRX / 07-14 STI/Legacy GT Bosch EV14 1200cc Injectors (Set of 4)
Vendor:DeatschWerksRegular price $569.00 USDRegular priceUnit price / per$569.00 USDSale price $569.00 USD -
Perrin Recirculating Blow Off Valve | 2008-2014 Subaru WRX (PSP-TAC-610)
Vendor:Perrin PerformanceRegular price $236.30 USDRegular priceUnit price / per$278.00 USDSale price $236.30 USDSale
Engine Upgrades for Subaru Legacy B4 BL: Boost Power and Reliability
Unlock the full potential of your Subaru Legacy B4 BL with our specialized engine upgrades designed to enhance power, throttle response, and overall engine reliability. Each component in this collection is tailored to fit your model perfectly, ensuring smooth drivability while delivering noticeable performance improvements.
What are the key benefits of upgrading your Subaru Legacy B4 BL engine?
Upgrading your engine components can significantly improve your Legacy’s responsiveness and power delivery. Enhanced intake and exhaust systems increase airflow efficiency, while cooling upgrades help maintain optimal engine temperatures under demanding conditions. These improvements contribute to a more reliable and enjoyable driving experience.
- Improved throttle response and acceleration
- Better thermal management for consistent performance
- Increased engine efficiency and power output
- Enhanced durability with high-quality aftermarket parts
How to choose the right engine upgrades for your Legacy B4 BL?
Selecting the right parts depends on your driving goals and current setup. Intake systems should focus on maximizing airflow without sacrificing drivability, while exhaust upgrades can reduce backpressure for smoother power delivery. Cooling solutions like upgraded radiators or intercoolers are essential if you plan on pushing your engine harder or tuning for more power.
Explore Subaru Legacy B4 BL engine upgrades at WheelFlip
Our collection features a range of performance parts including intake kits, exhaust components, cooling upgrades, and tuning accessories—all chosen for their fitment and reliability on the Legacy B4 BL platform. Shop with confidence at WheelFlip and find the right upgrades to elevate your Subaru’s performance on the street or track.








