Cusco Sway Bar Rear 21mm BP9 Legacy-GT (will fit V6 n/a models)

Cusco is well-known for making performance suspension parts for Japanese vehicles, and this rear sway bar is a great example of their work for your 2005-2009 Subaru Legacy GT. If you're looking to improve how your car handles corners, a thicker sway bar like this one is a popular way to go. It connects the left and right sides of your suspension, helping to keep the body of your car flatter when you're turning.

This particular sway bar measures 21mm, which is a noticeable step up from the stock bar. That increased stiffness means less body roll, giving you a more connected feel to the road and improved stability during spirited driving. It's designed to fit your Legacy GT directly, and Cusco also notes it will fit the V6 naturally aspirated models from those years. Installing a rear sway bar is a common modification that makes a real difference in how your car feels when you take corners.