Collection: Engine Upgrades For Subaru Legacy B4 BL
-
Turbosmart Kompact Dual Port Blow-Off Valve | Subaru WRX (08-14) / Legacy GT (03-08)
Vendor:TurbosmartRegular price $217.93 USDRegular priceUnit price / per$284.99 USDSale price $217.93 USDSale -
Manley Performance 37mm Stainless Race Flo Valve | Subaru WRX (00-03) / STi (04) (11140-1)
Vendor:Manley PerformanceRegular price $24.40 USDRegular priceUnit price / per$31.42 USDSale price $24.40 USDSale -
Manley Extreme Duty Valve | Subaru WRX (EJ20) / STI (00-03) (11139-1)
Vendor:Manley PerformanceRegular price $63.36 USDRegular priceUnit price / per$81.60 USDSale price $63.36 USDSale -
DeatschWerks 255 LPH In-Tank Fuel Pump Set Up Kit | Subaru WRX (02-07) / Impreza (93-07) / Legacy (90-07) (9-201-0791)
Vendor:DeatschWerksRegular price $87.20 USDRegular priceUnit price / per$109.00 USDSale price $87.20 USDSale -
King Engine Bearings Subaru WRX/STi EJ20/EJ22/EJ25 48mm Performance Rod Bearing Set | Subaru WRX/STi (CR4280XP0.5)
Vendor:King Engine BearingsRegular price $43.33 USDRegular priceUnit price / per$73.65 USDSale price $43.33 USDSale -
Radium Engineering Top Feed Fuel Rails | Subaru WRX / STI EJ-Series (20-0577-02)
Vendor:Radium EngineeringRegular price $181.14 USDRegular priceUnit price / per$219.95 USDSale price $181.14 USDSale -
DeatschWerks 340 LPH In-Tank Fuel Pump Kit | Subaru Impreza / WRX / Legacy (92-16) (9-301-0791)
Vendor:DeatschWerksRegular price $135.20 USDRegular priceUnit price / per$169.00 USDSale price $135.20 USDSale -
DeatschWerks 265 LPH In-Tank Fuel Pump | Subaru WRX (08-12) / STI (08-15) / LGT (05-09) (9-652-1008)
Vendor:DeatschWerksRegular price $127.20 USDRegular priceUnit price / per$159.00 USDSale price $127.20 USDSale -
Fel-Pro Turbocharger Outlet Gasket | Subaru WRX / Impreza / Legacy / Outback (89-21) (73560)
Vendor:Fel-ProRegular price $11.12 USDRegular priceUnit price / perSale price $11.12 USD -
Fel-Pro Engine Conversion Gasket Set | Subaru WRX / Outback (89-21) (CS26170)
Vendor:Fel-ProRegular price $50.02 USDRegular priceUnit price / perSale price $50.02 USD -
Grams Performance 550cc Fuel Injectors | Subaru WRX (02-11) / STI (07+) / Legacy (07-11) (G2-0550-1200)
Vendor:Grams PerformanceRegular price $340.93 USDRegular priceUnit price / per$386.39 USDSale price $340.93 USDSale -
Manley Turbo Tuff Pro Series I Beam Connecting Rod Set | Subaru WRX / STI (EJ205/EJ257) (89-15)
Vendor:Manley PerformanceRegular price $968.38 USDRegular priceUnit price / per$1,083.05 USDSale price $968.38 USDSale -
DeatschWerks 02+ Subaru WRX / 07+ STI / LGT Top Feed Fuel Rail Upgrade Kit w/ 2200cc Injectors | Subaru WRX / STI / LGT (02+ / 07+)
Vendor:DeatschWerksRegular price $930.82 USDRegular priceUnit price / per$989.00 USDSale price $930.82 USDSale -
Fel-Pro Turbocharger Inlet Gasket | Subaru WRX (2009-2021) (73561)
Vendor:Fel-ProRegular price $5.29 USDRegular priceUnit price / perSale price $5.29 USD -
DeatschWerks 1200cc Fuel Injectors | Subaru WRX / STI / Legacy GT (02-14 / 07-14) (16MX-07-1200-4)
Vendor:DeatschWerksRegular price $535.53 USDRegular priceUnit price / per$569.00 USDSale price $535.53 USDSale -

DeatschWerks 1500cc Fuel Injectors | Subaru WRX / Legacy GT / STI (02-14/07-14) (16M-07-1500-4)
Vendor:DeatschWerksRegular price $808.47 USDRegular priceUnit price / per$859.00 USDSale price $808.47 USDSale -
DeatschWerks Top Feed Fuel Rail Upgrade Kit | Subaru WRX / STI / LGT (02+) w/ 1200cc Injectors (6-102-1200)
Vendor:DeatschWerksRegular price $657.88 USDRegular priceUnit price / per$699.00 USDSale price $657.88 USDSale -
DeatschWerks Top Feed Fuel Rail Upgrade Kit w/ 1500cc Injectors | Subaru WRX (02+) / STI (07+) / LGT (00+)
Vendor:DeatschWerksRegular price $893.18 USDRegular priceUnit price / per$949.00 USDSale price $893.18 USDSale -
Manley Race Series 36mm Stainless Race Flo Valves | Subaru WRX (00-03) / STi (04) (11138-8)
Vendor:Manley PerformanceRegular price $195.18 USDRegular priceUnit price / per$251.36 USDSale price $195.18 USDSale -
Fel-Pro Engine Oil Pan Gasket Set | Subaru WRX (13-14) / WRX STI (13-21) (OS30656C)
Vendor:Fel-ProRegular price $8.00 USDRegular priceUnit price / perSale price $8.00 USD
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.










