Front Sway Bar – 15-18 Subaru STI – 25.4mm

Sway-A-Way’s high-performance 25.4mm front sway bar replacement for the 2015-2018 Subaru STI. Sway-A-Way’s 2015-2018 Subaru STI front sway bar is two-hole adjustable and offers a noticeable decrease in body roll resulting in better overall handling and steering response. Sway-A-Way’s Subaru sway bars include bushing grease and two molded polyurethane bushings designed to fit the factory bushing bracket.

SKU: 1908 Categories: ,

1 in stock (can be backordered)



2015-18 Subaru STI Front Sway Bar

Sway-A-Way’s 2015-2018 Subaru STI front sway bar is designed to replace the factory sway bar with an adjustable larger diameter sway bar. Stock, the 2015+ Subaru  STI both come equipped with a 24mm front sway bar. Sway-A-Way’s PN: 1908 is a 25.4mm replacement with two holes of adjustment. Hole one offers a 35% increase in stiffness, with the second hole offering a 17% increase. This small but tangible increase in stiffness results in less body roll for better overall handling and sharper steering response.

Sway Bar Stiffness Increase Chart

Sway-A-Way 2015-18 Subaru STI 25.4MM Front Sway Bar Compared to Stock 24MM

Sway BarHole 1Hole 2

CNC Bent to Factory Profile

Sway-A-Way uses in-house 3D scanning equipment and a CNC bender to closely match the factory sway bar profile. This process allows for Sway-A-Way to manufacturer highly accurate sway bars designed to easily bolt-in.

Precision Forged Ends

Through processes mastered over the last 30+ years, Sway-A-Way uses induction heating, presses, CNC plasma cutting, and custom tooling to craft forged ends. This combination of CNC bending and forged ends results in a sway bar that is both strong, accurate and ready for the track.

Powder Coated for Corrosion Resistance

Sway-A-Way sway bars are sent locally to be sand-blasted and powder coated a bright red finish for lasting corrosion resistance.

Polyurethane Bushings & Grease

Included with every sway bar are two polyurethane bushings cast specifically for the stock bushing bracket and Energy Suspension Formula 5 Polyurethane Grease. These bushings & grease are sourced directly from Energy Suspension, the leader in performance polyurethane products.

Pair this front sway bar with the Sway-A-Way rear sway bar in our 2015-2018 Subaru STI Front & Rear Sway Bar Kit. This kit reduces front and rear body roll, improves overall handling and grip, and removes factory understeer.

Sway-A-Way designs and manufacturers all Subaru sway bars in its Chatsworth, CA facility. Sway-A-Way’s Subaru sway bars are warrantied from defects in material and workmanship under normal use and service for a period of (2) two years from the date of sale to the original purchaser. Please review our complete warranty agreement.

Tech Specs

Sway Bar
25.4mm – CNC Bent – Forged Ends – Powder Coated

Hole 1: +35% Stiffness
Hole 2: +17% Stiffness

Powder Coat
Red Powder Coat

Polyurethane Bushings – Fits stock bushing bracket.

Energy Suspension – Formula 5 Pre-lube
The best grease on the market for polyurethane bushings.

Front 2015-2018 Subaru WRX/STI Endlinks

Rear 2008-2018 Subaru WRX/STI/BRZ Endlinks

Additional information

Weight20 lbs
Dimensions48 × 13 × 6 in



2015-2018 Subaru STI



Hole 1:

+35% Stiffer than 24mm OEM bar

Hole 2:

+17% Stiffer than 24mm OEM bar

You may also like…

© 2007-2016 Sway-A-Way® All Rights Reserved.