Cusco 6A1 492 TP Trunk Bar Plus Harness Power Brace for 2015-2021 Subaru WRX/STI

Vehicle Fitment

• 2015-2021 Subaru WRX STI (VAB, EJ257 2.5L Turbo DOHC H4, AWD)
• 2015-2021 Subaru WRX (VA, FA20DIT 2.0L Turbo DOHC H4, AWD)
• 2014-2018 Subaru Levorg 2.0GT/2.0GT-S (VMG, FA20 2.0L Turbo DOHC H4, AWD) - JDM
• 2014-2018 Subaru Levorg 1.6GT/1.6GT-S (VM4, FB16 1.6L Turbo DOHC H4, AWD) - JDM

Fitment Notes

• Fits both WRX (VA, non-STI) and WRX STI (VAB) across all 2015-2021 model years
• Also fits the JDM Subaru Levorg (VM4/VMG, 2014-2018) which shares the same rear trunk structure
• Trimming of trunk base covers is required for a clean finished installation
• 4 threaded harness bracket mounting points for competition safety harness eye bolts
• Position: Rear (trunk interior)

Features

• Dual-purpose design functions as both a rear chassis reinforcement brace and a safety harness mounting bar
• 4 threaded mounting points allow easy installation of harness eye bolts for 4-point or higher racing harnesses
• Adds reinforcement to the rear uni-body frame, reducing body flex under cornering loads
• Provides the same rigidity benefit as stitch welding without permanent chassis modification
• Steel construction with Cusco metallic blue painted finish for corrosion resistance and premium trunk appearance
• 100% bolt-on installation using existing factory mounting points - no drilling or fabrication required
• Effective on both stock and heavily modified chassis - stiffening benefits compound with other upgrades
• Developed using Cusco's motorsport chassis stress simulation data and competition experience
• Lightweight yet rigid construction engineered for optimal strength-to-weight ratio

Specifications

• Part Number: 6A1 492 TP
• Type: Power Brace Trunk Bar Plus (Chassis Brace / Harness Bar)
• Position: Rear (trunk interior)
• Material: Steel
• Finish: Cusco Metallic Blue Paint
• Harness Mounting Points: 4 threaded harness eye bolt brackets
• Installation: Bolt-on to existing factory trunk mounting points
• Modification Required: Trunk base cover trimming for clean installation
• Compatible Chassis: VAB (WRX STI), VA (WRX), VAG (WRX S4/JDM), VM4/VMG (Levorg/JDM)
• UPC: 4996338048844

Included Components

• 1x Cusco Power Brace Trunk Bar Plus Assembly (steel, with harness mounting brackets)
• 1x Mounting Hardware Kit

Product Description

The Cusco 6A1 492 TP Power Brace Trunk Bar Plus is a dual-purpose rear chassis reinforcement brace and safety harness bar designed for the 2015-2021 Subaru WRX and WRX STI (VA/VAB platform), as well as the JDM Subaru Levorg (VM4/VMG). This brace mounts in the trunk area using existing factory bolt locations, adding significant structural rigidity to the rear unibody while simultaneously providing four threaded mounting points for competition safety harness eye bolts. This makes it one of the most practical single-part upgrades for WRX and STI owners who drive on the track or participate in motorsport events requiring harness attachment points.

The brace is constructed from steel and finished in Cusco's signature metallic blue paint for corrosion resistance and a clean, professional appearance in the trunk. Installation is 100% bolt-on and uses only existing factory mounting points - no drilling, cutting, or permanent modification to the vehicle is necessary. Minor trimming of the factory trunk base covers is recommended for a finished look. The harness brackets are designed to accept standard eye bolt hardware for 4-point or higher racing harnesses, providing a secure anchor point that is significantly stronger than improvised mounting solutions.

By stiffening the rear trunk area of the unibody, this Power Brace reduces the chassis flex that occurs under high cornering loads, enabling the rear suspension to operate at its intended geometry for improved handling consistency and tire contact. The rigidity improvement is effective whether the vehicle is running a completely stock suspension setup or a fully modified coilover and sway bar package - each additional point of chassis reinforcement builds cumulatively. This trunk brace pairs with Cusco's full VA-platform Power Brace lineup, including the front brace (6A1 492 FS), center crossmember brace (6A1 492 FM), rear member brace (6A1 492 RM), rear cross brace (6A1 541 AX), and seat rail brace (6A1 492 SP) for a comprehensive front-to-rear chassis stiffening system.