If you're in the market for a new cat back system for your Street Wrx, there are a few different options available. All of the systems come with a variety of benefits and drawbacks, so it's important to choose the one that is best suited for your car and your needs. Here are some of the most popular performance cat back exhausts for the Street Wrx:
The Infinity System: Infinity's system is probably the least expensive of the bunch. However, you can still expect an impressive amount of sound from this system. The system comes with a 3-inch speaker and produces an impressive amount of sound. It also doesn't have any noticeable muffler drone noise, which is nice.
The HKS System: HKS' system is one of the most expensive systems on this list. However, it produces an impressive amount of sound and has a really cool look to it. The system comes with a 3-inch speaker and produces an impressive amount of sound.
With that being said, it does have some muffler drone noise when using stock exhausts, so if you're looking to upgrade your exhaust but don't want to spend the extra money on a full-blown exhaust, you might want to consider spending the extra money on a muffler.
It comes with a 3-inch speaker that produces an amazing amount of sound and has no noticeable muffler drone noise at all. Not only that, but it's completely modular, so it can fit any vehicle regardless of its stock or aftermarket.