Whiteline
Whiteline 22 mm Adjustable Rear Sway Bar - 2015-2021 Subaru WRX
Regular price $350.88Unit priceWhiteline
Whiteline 20 mm Fixed Rear Sway Bar - 2015-2021 Subaru WRX
Regular price $298.88Unit priceWhiteline
Whiteline 20 mm Adjustable Rear Sway Bar - 2015-2021 Subaru WRX
Regular price $324.88Unit priceWhiteline
Whiteline Rear Sway Bar Mount Support Braces - 2015-2021 WRX / STI
Regular price $106.88Unit priceWhiteline
Whiteline Adjustable Front Sway Bar End Links - 2015-2021 Subaru WRX
Regular price $181.88Unit priceWhiteline
Whiteline 26 mm Adjustable Front Sway Bar - 2015-2021 Subaru WRX
Regular price $319.88Unit priceWhiteline
Whiteline Front and Rear Sway Bar Kit - 2015-2021 Subaru WRX
Regular price $939.88Unit priceWhiteline
Whiteline Fixed Rear Sway Bar End Links - Subaru WRX / STI
Regular price $181.88Unit priceWhiteline
Whiteline Adjustable Rear Sway Bar End Links - Subaru WRX / STI / BRZ
Regular price $181.88Unit priceWhiteline
Whiteline 22 mm Adjustable Rear Sway Bar - 2022+ Subaru WRX
Regular price $271.88Unit priceWhiteline
Whiteline Adjustable Front Sway Bar End Links - 2022+ Subaru WRX
Regular price $181.88Unit priceWhiteline
Whiteline 24 mm Adjustable Front Sway Bar - 2022+ Subaru WRX
Regular price $299.88Unit priceGrimmSpeed
GrimmSpeed Front Strut Tower Brace - 2008-2014 Subaru WRX / STI
Regular price $249.00Unit priceGrimmSpeed
GrimmSpeed Front Strut Tower Brace - 2015-2021 Subaru WRX / STI
Regular price $249.00Unit price
None of this needs a tune. The usual first change is a bigger, adjustable rear sway bar with stronger end links, which cuts understeer without hurting the ride much. Bushings are the next step, and on older cars they are often worn out anyway. If you lower the car with springs or coilovers, get an alignment after install, and look at camber and caster parts if you want to dial it in further.
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