Collection: Engine Upgrades For Subaru Legacy B4 BL
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DeatschWerks 02+ Subaru WRX / 07+ STI/LGT Top Feed Fuel Rail Upgrade Kit w/ 1000cc Injectors | (6-102-1000)
Vendor:DeatschWerksRegular price $582.59 USDRegular priceUnit price / per$619.00 USDSale price $582.59 USDSale -
Fel-Pro Engine Camshaft Plug Set | Subaru WRX (13-14) / WRX STI (13-20) / Outback (00-12)
Vendor:Fel-ProRegular price $6.04 USDRegular priceUnit price / perSale price $6.04 USD -
Manley Performance Valve Spring and Retainer Kit | Subaru WRX / WRX STI (16) (26180)
Vendor:Manley PerformanceRegular price $321.58 USDRegular priceUnit price / per$341.68 USDSale price $321.58 USDSale -
Fel-Pro Throttle Body Mounting Gasket | Subaru WRX STI / Forester (13-20) (61359)
Vendor:Fel-ProRegular price $4.86 USDRegular priceUnit price / perSale price $4.86 USD -
DeatschWerks 1000cc Bosch EV14 Fuel Injectors | Subaru WRX (02-12) / STi (07-12) / Legacy GT (07-12) (17U-07-1000-4)
Vendor:DeatschWerksRegular price $441.41 USDRegular priceUnit price / per$469.00 USDSale price $441.41 USDSale -
DeatschWerks 02+ Subaru WRX / 07+ STI/LGT Top Feed Fuel Rail Upgrade Kit | Subaru WRX / STI / LGT (6-102-0750)
Vendor:DeatschWerksRegular price $563.76 USDRegular priceUnit price / per$599.00 USDSale price $563.76 USDSale -
Manley Turbo Tuff Pro Series I Beam Connecting Rod | Subaru WRX / STI (89-15) (14416-1)
Vendor:Manley PerformanceRegular price $254.84 USDRegular priceUnit price / per$270.76 USDSale price $254.84 USDSale -
Fel-Pro Engine Water Pump Gasket | Subaru WRX (13-14) / WRX STI (13-21) / Forester (98-13) (35747)
Vendor:Fel-ProRegular price $4.52 USDRegular priceUnit price / perSale price $4.52 USD -
Manley Turbo Tuff I Beam Connecting Rod Set | Subaru WRX/STI EJ205/EJ257 (89-15) (14416R6-4)
Vendor:Manley PerformanceRegular price $1,307.60 USDRegular priceUnit price / per$1,389.33 USDSale price $1,307.60 USDSale -
Turbosmart Kompact Plumb Back BOV | Subaru WRX (08+) TS-0203-1210
Vendor:TurbosmartRegular price $206.09 USDRegular priceUnit price / per$228.99 USDSale price $206.09 USDSale -
GFB TMS Respons Blow Off Valve Kit | Subaru WRX / Legacy GT (08-10+) / 05-09 LGT
Vendor:Go Fast BitsRegular price $254.79 USDRegular priceUnit price / per$356.50 USDSale price $254.79 USDSale -
Fel-Pro PermaTorque Engine Cylinder Head Gasket | Subaru WRX (13-18) / Outback (10-12) (${sku})
Vendor:Fel-ProRegular price $46.26 USDRegular priceUnit price / perSale price $46.26 USD -

Manley STD Stroke 99.5mm Bore 9.8:1 Dish Piston Set with Rings | Subaru WRX STi (04+) (612100C-4)
Vendor:Manley PerformanceRegular price $679.55 USDRegular priceUnit price / per$760.03 USDSale price $679.55 USDSale -
DeatschWerks 2200cc Injectors | Subaru WRX / Legacy GT / STI (16S-01-2200-4)
Vendor:DeatschWerksRegular price $808.47 USDRegular priceUnit price / per$859.00 USDSale price $808.47 USDSale -
Manley Race Series 37mm Stainless Race Flo Valves | Subaru WRX (00-03) / STi (04) (11140-8)
Vendor:Manley PerformanceRegular price $185.42 USDRegular priceUnit price / per$251.36 USDSale price $185.42 USDSale -

Fel-Pro Engine Camshaft Seal Kit | Subaru WRX (13-20) / WRX STI (13-21) / Outback (05-09) (TCS46140)
Vendor:Fel-ProRegular price $15.56 USDRegular priceUnit price / perSale price $15.56 USD -
Radium Engineering Top Feed Fuel Rail Upgrade | Subaru WRX/STI (02-14) (20-0567-02)
Vendor:Radium EngineeringRegular price $199.45 USDRegular priceUnit price / per$209.95 USDSale price $199.45 USDSale -
DeatschWerks Fuel Pump Set Up Kit | Honda Civic (06-11) / Legacy GT (05-09) / WRX/STi (08-12) (9-1008)
Vendor:DeatschWerksRegular price $12.00 USDRegular priceUnit price / per$15.00 USDSale price $12.00 USDSale -
DeatschWerks 750cc EV14 Fuel Injectors | Subaru WRX (02-14) / Legacy GT (07-14) (17U-07-0750-4)
Vendor:DeatschWerksRegular price $413.18 USDRegular priceUnit price / per$439.00 USDSale price $413.18 USDSale -
DeatschWerks Fuel Pump Set Up Kit | Subaru WRX/STi (02-07) / Impreza (93-07) / Legacy (90-07) (9-0791)
Vendor:DeatschWerksRegular price $17.60 USDRegular priceUnit price / per$22.00 USDSale price $17.60 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.










