Whiteline Front Sway Bar 26mm Adjustable – 2015-2021 Subaru STI

Whiteline Front Sway Bar 26mm Adjustable – 2015-2021 Subaru STI

Track-Level Front Roll Control for the VA STI
The Whiteline BSF48Z is a 26mm 3-point adjustable front sway bar for the 2015-2021 Subaru STI (VA chassis). Positioned between the 22mm street bar and the 27mm maximum option, the 26mm BSF48Z is the track-oriented choice for VA STI builds — significant front roll stiffness improvement over factory with the adjustability to fine-tune for different circuits and conditions.

DETAILS

• 26mm 3-point blade adjustable front sway bar
• Solid spring steel, silver powder coat
• Includes mount bushings and hardware
• 3 adjustment positions
• Fitment: 2015-2021 Subaru STI (VA chassis)
• Track and performance use

VA STI at the Track
The VA STI is built for performance from the factory, but the front bar calibration is still conservative relative to what track use demands. The 26mm BSF48Z provides meaningful additional front roll stiffness for circuit and autocross configurations — enough to make a real difference in body roll control without going to the extreme of the 27mm bar.

Three Positions for Setup
Middle position provides a good balance for most track applications. Outer position for maximum front stiffness on smooth circuits. Inner position for a slightly softer setting when circuit conditions warrant it or when the rear bar setup requires a more balanced front.

Complete With the Rear Bar
The VA STI front bar is most effective when matched with a rear bar upgrade — the BSR series for the VA chassis. Whiteline’s complete front and rear sway bar kit for the VA STI (WHLBSK019) packages both bars and endlinks together.

Why Choose Whiteline

Whiteline has been engineering suspension components from their facility in Australia since 1979. Every product in their catalog is developed with a clear goal: measurable improvement in handling, stability, and tyre contact. Whiteline’s polyurethane bushings, sway bars, control arms, and alignment correction kits are engineered using finite element analysis and validated on track before they reach the market. Their components are direct-fit, bolt-on solutions designed for enthusiasts who want real performance gains without fabrication or custom work.

The RallySport Take

The right front bar for a seriously-used VA STI. More than the street spec, less than maximum — a sensible performance choice for track-focused builds. Installation is a straightforward bar swap — remove the OEM bar, install the Whiteline unit with the provided polyurethane mount bushings, connect the endlinks. Start in the middle adjustment position and move from there. Adjustable endlinks are a worthwhile companion purchase if the car has been lowered, ensuring the bar operates at zero preload at the new ride height.

What’s in the Box

• 26mm 3-point blade adjustable front sway bar
• Solid spring steel, silver powder coat
• Includes mount bushings and hardware
• 3 adjustment positions
• Track and performance use

Fitment