Collection: Engine Upgrades For Subaru Legacy B4 BL
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Liqui Moly 20L Synthoil Race Tech GT1 Motor Oil 10W-60 (20127)
Vendor:LIQUI MOLYRegular price $428.99 USDRegular priceUnit price / per$428.99 USDSale price $428.99 USD -
Torque Solution Steering Rack Brace | 2008-2021 Subaru WRX/STI (TS-SU-388)
Vendor:Torque SolutionRegular price $54.89 USDRegular priceUnit price / per$66.65 USDSale price $54.89 USDSale -

Manley STD Stroke 99.5mm Bore 9.8:1 Dish Piston Set with Rings | Subaru WRX STi (04+) (612100C-4)
Vendor:Manley PerformanceRegular price $741.18 USDRegular priceUnit price / per$805.63 USDSale price $741.18 USDSale -
Torque Solution Engine Mounts with Mount Plates | 2006-2015 Subaru WRX/STI (TS-SU-200-PL)
Vendor:Torque SolutionRegular price $320.26 USDRegular priceUnit price / per$388.88 USDSale price $320.26 USDSale -
Cometic 100mm Bore MLS Headgasket .040" | Subaru 90-01 Impreza/Legacy 2.0/2.5L (H1631SPK040S)
Vendor:Cometic GasketRegular price $48.29 USDRegular priceUnit price / per$57.59 USDSale price $48.29 USDSale -
Manley 75mm DE-STROKED Piston Set w/ Rings | Subaru WRX STI (04+) (621002C-4)
Vendor:Manley PerformanceRegular price $741.18 USDRegular priceUnit price / per$805.63 USDSale price $741.18 USDSale -
Torque Solution 12MM Exhaust Mount | Multiple Subaru Fitments (TS-SU-012)
Vendor:Torque SolutionRegular price $10.96 USDRegular priceUnit price / per$13.32 USDSale price $10.96 USDSale -
Torque Solution 12MM Exhaust Mount Long Subaru WRX/STI & Legacy GT (05-14) (TS-SU-012L)
Vendor:Torque SolutionRegular price $15.55 USDRegular priceUnit price / per$18.88 USDSale price $15.55 USDSale -
Torque Solution Exhaust Mount Kit | 2008-2021 Subaru WRX (TS-SU-0124)
Vendor:Torque SolutionRegular price $43.00 USDRegular priceUnit price / per$52.21 USDSale price $43.00 USDSale -
Cometic StreetPro Engine Gasket Kit 101mm Bore | Multiple Subaru Fitments (PRO2046C)
Vendor:Cometic GasketRegular price $357.14 USDRegular priceUnit price / per$384.01 USDSale price $357.14 USDSale -
Torque Solution Cylinder 4 Coolant Mod | Subaru EJ20/EJ25 Engines (TS-SU-585)
Vendor:Torque SolutionRegular price $73.20 USDRegular priceUnit price / per$88.88 USDSale price $73.20 USDSale -
Torque Solution -10AN Turbo Oil Return Fitting | Subaru EJ (TS-SU-486)
Vendor:Torque SolutionRegular price $50.32 USDRegular priceUnit price / per$61.10 USDSale price $50.32 USDSale -
Torque Solution WIX Oil Filter Adapter | Subaru EJ/FA (TS-SU-516) (TS-SU-516)
Vendor:Torque SolutionRegular price $91.49 USDRegular priceUnit price / per$111.10 USDSale price $91.49 USDSale -
Torque Solution Valve Cover Cam Seals | Multiple Fitments (TS-SU-417S)
Vendor:Torque SolutionRegular price $50.32 USDRegular priceUnit price / per$61.10 USDSale price $50.32 USDSale -
Banks Power Pedal Fits Monster Stand-Alone Throttle Controller 64325
Vendor:Banks PowerRegular price $295.00 USDRegular priceUnit price / per$327.78 USDSale price $295.00 USDSale -
GFB 02-10 WRX/STI 2 Piece Under-Drive Pulley Kit | Subaru WRX/ STI (02-10) (2001)
Vendor:Go Fast BitsRegular price $193.68 USDRegular priceUnit price / per$271.00 USDSale price $193.68 USDSale -
Go Fast Bits 02-10+ WRX/STI Crank Pulley | Subaru WRX / STI (02-10+)
Vendor:Go Fast BitsRegular price $133.65 USDRegular priceUnit price / per$187.00 USDSale price $133.65 USDSale -

GFB Deceptor Pro II Blow Off Valve | Subaru Impreza / Legacy / Forester / Outback (92-14) (T9501)
Vendor:Go Fast BitsRegular price $375.36 USDRegular priceUnit price / per$525.20 USDSale price $375.36 USDSale -
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 Extreme Duty 32mm Exhaust Valves | Subaru WRX (00-03) / STi (04)
Vendor:Manley PerformanceRegular price $548.34 USDRegular priceUnit price / per$685.43 USDSale price $548.34 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.









