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/ 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 $143.91 USDRegular priceUnit price / per$278.00 USDSale price $143.91 USDSale -
Turbosmart Supersonic Blow Off Valve for Mazda/Subaru - Black (TS-0205-1310)
Vendor:TurbosmartRegular price $329.58 USDRegular priceUnit price / per$430.99 USDSale price $329.58 USDSale -
aFe Pro Guard D2 Oil Filter Set of 4 | Scion FR-S / Subaru BRZ (13-17) (44-LF018-MB)
Vendor:aFeRegular price $54.00 USDRegular priceUnit price / per$54.00 USDSale price $54.00 USD -
aFe Pro GUARD D2 Oil Filter | Scion FR-S / Subaru BRZ 2013 (44-LF018)
Vendor:aFeRegular price $15.61 USDRegular priceUnit price / per$16.00 USDSale price $15.61 USDSale -
aFe Pro GUARD D2 Oil Filter | Nissan Cars (03-13) / Subaru Cars H4 (04-13) (44-LF017)
Vendor:aFeRegular price $15.61 USDRegular priceUnit price / per$16.00 USDSale price $15.61 USDSale -

aFe Pro GUARD D2 Oil Filter (4 Pack) | Nissan Cars L4 (02-17) / Subaru Cars H4 (04-17) (44-LF017-MB)
Vendor:aFeRegular price $54.00 USDRegular priceUnit price / per$54.00 USDSale price $54.00 USD -
ARP Rod Bolt Kits | Multiple Subaru Fitments (260-6301)
Vendor:ARPRegular price $124.34 USDRegular priceUnit price / per$136.37 USDSale price $124.34 USDSale -
ARP Head Stud Kit | 2002-2014 Subaru WRX and 2004-2021 Subaru WRX STI (260-4701)
Vendor:ARPRegular price $276.74 USDRegular priceUnit price / per$303.53 USDSale price $276.74 USDSale -
Brian Crower Spring Retainer Kit | 2002+ Subaru WRX/STi (BC0600)
Vendor:Brian CrowerRegular price From $83.58 USDRegular priceUnit price / per$96.00 USDSale price From $83.58 USDSale -
Brian Crower Single Valve Spring and Steel Retainer Kit | Subaru Multiple Fitments (BC0600S)
Vendor:Brian CrowerRegular price $195.00 USDRegular priceUnit price / per$195.00 USDSale price $195.00 USD -
Brian Crower Dual Spring Titanium Retainer Kit | 2002+ Subaru EJ-Series (BC0610)
Vendor:Brian CrowerRegular price $471.86 USDRegular priceUnit price / per$542.00 USDSale price $471.86 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.









