Collection: Engine Upgrades For Subaru Legacy B4 BL
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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 -
ACT Pilot Bearing | Toyota Tacoma 2002 (PB1004)
Vendor:ACTRegular price $7.00 USDRegular priceUnit price / per$9.00 USDSale price $7.00 USDSale -
K&N Oil Filter | 2015+ Subaru WRX / 2008-2015 Mitsubishi Evo X (HP-1004)
Vendor:K&N EngineeringRegular price $11.82 USDRegular priceUnit price / per$17.99 USDSale price $11.82 USDSale -
Torque Solution Lightweight Crank Pulley | Subaru Impreza WRX/Legacy (02-14) (TS-SU-207A)
Vendor:Torque SolutionRegular price $88.88 USDRegular priceUnit price / per$111.10 USDSale price $88.88 USDSale -

Torque Solution Engine Mounts | 2002-2014 Subaru WRX and 2004-2021 Subaru WRX STI (TS-SU-200)
Vendor:Torque SolutionRegular price $231.11 USDRegular priceUnit price / per$288.88 USDSale price $231.11 USDSale -
Torque Solution Billet Timing Belt Guide | Subaru WRX (02-14)/STI (04-16) (TS-SU-010)
Vendor:Torque SolutionRegular price $47.99 USDRegular priceUnit price / per$59.99 USDSale price $47.99 USDSale -
Torque Solution 12MM Exhaust Mount | Multiple Subaru Fitments (TS-SU-012)
Vendor:Torque SolutionRegular price $10.65 USDRegular priceUnit price / per$13.32 USDSale price $10.65 USDSale -
Torque Solution Solid Billet Engine Mounts | Multiple Subaru Fitments (TS-SU-200SB)
Vendor:Torque SolutionRegular price $151.11 USDRegular priceUnit price / per$188.88 USDSale price $151.11 USDSale -
Torque Solution Solid Billet Engine Mounts | Subaru Impreza WRX/Forester/X (02-14) (TS-SU-200SB-PL)
Vendor:Torque SolutionRegular price $239.99 USDRegular priceUnit price / per$299.99 USDSale price $239.99 USDSale -
Torque Solution -10AN Turbo Oil Return Line Kit | Subaru EJ (TS-SU-486K)
Vendor:Torque SolutionRegular price $115.54 USDRegular priceUnit price / per$144.43 USDSale price $115.54 USDSale -
Torque Solution -10AN Turbo Oil Return Line Kit | Subaru EJ (95-14) (TS-SU-486K-G)
Vendor:Torque SolutionRegular price $115.54 USDRegular priceUnit price / per$144.43 USDSale price $115.54 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.






