Collection: Drivetrain Upgrades For Subaru Legacy B4 BM
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Competition Clutch Stage 2 Clutch Kit | 2005-2011 Subaru Legacy GT (15026-RK-2100)
Vendor:Competition ClutchRegular price $630.00 USDRegular priceUnit price / per$765.00 USDSale price $630.00 USDSale -
Exedy Hyper Series Accessory Kit | Multiple Fitments (FJAK101)
Vendor:ExedyRegular price $64.78 USDRegular priceUnit price / per$76.21 USDSale price $64.78 USDSale -
Action Clutch Stage 4 HD Clutch Kit | Subaru Legacy GT 05-12 (ACR-1847)
Vendor:Action ClutchRegular price $835.85 USDRegular priceUnit price / per$862.71 USDSale price $835.85 USDSale -
Action Clutch Stage 6 2.5L EJ255 Clutch Kit + Lightened Flywheel | Subaru Legacy 05-12 (ACR-1849)
Vendor:Action ClutchRegular price $897.61 USDRegular priceUnit price / per$926.46 USDSale price $897.61 USDSale -
Action Clutch Stage 5 Clutch Kit for Subaru Legacy 10-20 2.5L AWD (ACR-1855)
Vendor:Action ClutchRegular price $541.27 USDRegular priceUnit price / per$558.66 USDSale price $541.27 USDSale -
Action Clutch Stage 4 Clutch Kit | Subaru Legacy (10-12) (ACR-1854)
Vendor:Action ClutchRegular price $491.45 USDRegular priceUnit price / per$507.24 USDSale price $491.45 USDSale -
Action Clutch Stage 6 Clutch Kit | Subaru Legacy 10-20 2.5L AWD (ACR-1856)
Vendor:Action ClutchRegular price $541.27 USDRegular priceUnit price / per$558.66 USDSale price $541.27 USDSale -
Action Clutch Stage 3 Clutch Kit for Subaru Legacy 10-20 2.5L AWD (ACR-1853)
Vendor:Action ClutchRegular price $491.45 USDRegular priceUnit price / per$507.24 USDSale price $491.45 USDSale -
SuperPro SPF Differential Mount Bushings | 2015+ Subaru WRX/STI (SPF3201K)
Vendor:SuperproRegular price $71.28 USDRegular priceUnit price / per$100.99 USDSale price $71.28 USDSale -
Clutch Masters Aluminum Flywheel | 2006-2018 Subaru WRX (FW-021-AL)
Vendor:Clutch MastersRegular price $427.99 USDRegular priceUnit price / per$525.00 USDSale price $427.99 USDSale -
Competition Clutch Strip Series 1620 Clutch Kit | Multiple Fitments (15021-1620)
Vendor:Competition ClutchRegular price $514.71 USDRegular priceUnit price / per$625.00 USDSale price $514.71 USDSale -
SuperPro Rear Differential Pinion Bracket Mount Bushings | Multiple Subaru Fitments (SPF3200K)
Vendor:SuperproRegular price $51.52 USDRegular priceUnit price / per$72.99 USDSale price $51.52 USDSale -
Exedy Organic Stage 1 Clutch Kit | Multiple Subaru Fitments (15804)
Vendor:ExedyRegular price $344.00 USDRegular priceUnit price / per$404.72 USDSale price $344.00 USDSale -
Whiteline KDT901 Gearbox Shift Bushings | Subaru WRX/STI, Forester XT (04-23) (KDT901)
Vendor:WhitelineRegular price $54.28 USDRegular priceUnit price / per$77.88 USDSale price $54.28 USDSale -
Exedy Racing Stage 2 Cerametallic Clutch Kit | Multiple Subaru Fitments (15952)
Vendor:ExedyRegular price $513.48 USDRegular priceUnit price / per$604.11 USDSale price $513.48 USDSale -
Exedy Hyper Multi Disc Assembly B - Sprung Center Disc | Multiple Fitments (DM16DB)
Vendor:ExedyRegular price $419.18 USDRegular priceUnit price / per$493.17 USDSale price $419.18 USDSale -
Exedy Hyper Multi Disc Assembly A - Sprung Center Disc | Multiple Fitments (DM16DA)
Vendor:ExedyRegular price $419.18 USDRegular priceUnit price / per$493.17 USDSale price $419.18 USDSale -

ACT Heavy Duty Performance Street Sprung Clutch Kit | Subaru WRX (Excl. STI) (06-25) (SB12-HDSS)
Vendor:ACTRegular price $1,129.36 USDRegular priceUnit price / per$1,486.00 USDSale price $1,129.36 USDSale -
Action Clutch Stage 1 Clutch Kit | Subaru Legacy 10-20 (ACR-1851)
Vendor:Action ClutchRegular price $441.62 USDRegular priceUnit price / per$455.81 USDSale price $441.62 USDSale -
Whiteline Rear Diff Mount Insert Bushings | Subaru Multiple Fitments (KDT927)
Vendor:WhitelineRegular price $31.28 USDRegular priceUnit price / per$44.88 USDSale price $31.28 USDSale
Drivetrain Upgrades for Subaru Legacy B4 BM: Optimize Power and Reliability
Enhance your Subaru Legacy B4 BM’s performance with drivetrain upgrades tailored to its unique specifications. This collection offers premium aftermarket parts designed to improve power delivery, shift response, and drivetrain durability for a more engaging and reliable driving experience.
What are the benefits of upgrading your Legacy B4 BM drivetrain components?
Upgrading drivetrain parts such as clutches, flywheels, and mounts can significantly improve your vehicle’s responsiveness and power transfer. Enhanced components reduce drivetrain slippage, improve shift precision, and increase durability under demanding conditions, making them ideal for spirited driving or track use.
- Smoother and quicker gear shifts for better control
- Improved power delivery with reduced drivetrain losses
- Increased longevity of drivetrain components under stress
How to choose the right drivetrain parts for your Subaru Legacy B4 BM
Selecting drivetrain upgrades requires attention to fitment and performance goals. Consider the type of driving you do and the level of modification on your Legacy. Performance clutches and flywheels vary in material and design, while mounts and axles should match your vehicle’s specifications to maintain reliability and drivability.
Key drivetrain upgrades to enhance your Subaru Legacy B4 BM
This collection includes essential components to elevate your Legacy’s drivetrain performance. From performance clutches and lightweight flywheels to reinforced mounts and durable axles, each part is engineered for fitment confidence and lasting reliability. Shop WheelFlip’s drivetrain upgrades to optimize your Legacy B4 BM’s power and handling.


