Overview Reviews Product Description The PERRIN Dual Tube Catback Exhaust is designed for high performance, long life, and great sound. Splitting the exhaust flow into two tubes creates a higher flow capacity and a unique sound for your Subaru boxer engine. Product Videos Custom Field Product Reviews Write a Review Write a Review × Perrin Performance Perrin Dual Tube Catback Exhaust for 11+ Subaru WRX / STI Sedan Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *