Overcome stock WRX inefficiencies with the durable, free-flowing, and ultra-optimized Grimmspeed exhaust header! After years of exhaust testing, tweaking, and refinement, this high-performance exhaust system delivers significant performance boosts backed by a precision design that’s built to last. If you’re looking for the best Subaru performance parts to take your...

Enhance throttle response, boost the power, and revel in the throaty muffler sounds with any of the best cat-back exhausts featured here at JDMuscle. Our innovative cat-back exhaust systems free up your exhaust gas flow, boost horsepower, and reduce engine fatigue with greatly enhanced airflow. These versatile systems improve gas...

Before adding some flair and performance to your ride, you might be wondering a few things about your potential upgrades. With new parts and upgrades being developed daily, and tons of information out there, discovering which parts are right for you requires some research. There’s a lot to consider in...