Remark 15-21 Subaru WRX STI R1 Spec Cat-Back Exhaust Single Exit - Full Titanium

If you're looking to change the sound and feel of your 2015-2021 Subaru WRX STI, a cat-back exhaust system is a great place to start. This R1 Spec system from Remark is built entirely from titanium, which not only makes it incredibly lightweight but also gives it a unique tone that gets better with age. It's designed as a single-exit system, offering a cleaner, more focused look under the rear of the car.

The full titanium construction is the standout feature here. Titanium is known for its strength and resistance to corrosion, but its real advantage in an exhaust is its weight savings. This system is significantly lighter than a stock exhaust, which can make a small but noticeable difference in how the car handles. The R1 Spec is tuned to produce an aggressive, deep exhaust note that's noticeable without being overwhelming for daily driving. You'll hear it when you get on the throttle, and it adds a satisfying growl to the boxer engine's character. The single-exit design is a stylistic choice that many owners prefer for its sleek appearance.

This cat-back system is designed to fit directly onto your WRX STI, replacing the factory exhaust from the catalytic converter back. Installation is straightforward for someone familiar with exhaust work, typically involving unbolting the old system and bolting in the new one. You'll want to ensure you have the proper hangers and clamps, which are usually included or can be transferred from your old exhaust. The titanium will develop a unique patina over time, changing color as it heats and cools, giving your exhaust a custom look that tells a story.