Kartboy 15-21 Subaru WRX/WRX STi Rear Differential/Carrier Wedgelock System

If you're looking to tighten up the rear end of your 2015-2021 Subaru WRX or WRX STi, this rear differential carrier wedgelock system from Kartboy is a solid option. This kit is designed to reduce the unwanted movement of the rear differential and carrier, which can lead to a more connected and responsive feel during spirited driving or track use. By minimizing flex and slop in the drivetrain, you'll notice improved stability and more predictable handling when accelerating out of corners.

Kartboy is known for making well-built parts for Subarus, and this wedgelock system is no exception. It's made from durable materials that can handle the stresses of performance driving. The design aims to provide a noticeable improvement in how the rear of your car feels under load, making it a popular choice for owners looking to enhance their vehicle's performance characteristics. Installation involves accessing the differential carrier, and while it requires some mechanical know-how, it's a direct bolt-on modification that doesn't require welding or permanent alterations to your car.