Invidia 15+ Subaru STI 4Dr Q300 Single Layer Stainless Steel Quad Tip Cat-Back Exhaust

This Invidia Q300 cat-back exhaust system is made for the 2015 and newer Subaru STI 4-door models. It's designed to replace the factory exhaust from the catalytic converter back, giving your STI a more refined sound and improved exhaust flow. The Q300 series is known for its balance between performance and a comfortable sound level, making it a popular choice for daily drivers who still want a sportier feel.

Constructed from single-layer stainless steel, this exhaust is built to last and resist corrosion. The quad-tip design with polished stainless steel finishers adds a distinct visual appeal to the rear of your STI. While it's a cat-back system, meaning it doesn't alter emissions equipment, it's engineered to reduce backpressure compared to the stock setup. This can lead to a slight improvement in throttle response and a deeper, more satisfying exhaust note without being overly loud or droney at cruising speeds. The polished tips are a nice touch, giving your STI a more aggressive look.

When installing this cat-back system, you'll typically find it's a direct bolt-on replacement for the factory exhaust. It's designed to fit right without requiring any welding or cutting. You'll want to ensure you have the necessary hardware, though this system is designed to utilize most of the stock mounting points. The result is a well-built exhaust that enhances both the sound and appearance of your Subaru STI.