Perrin Dual Tube Cat Back Exhaust 2011-2021 WRX Sedan / 2011-2021 STI Sedan

You are looking at the PERRIN Dual Tube Cat-Back Exhaust System. This system uses a dual tube system. It starts as a single 3" tube then transitions into a Y that feeds into dual 2.25" tubes. These two 2.25" tubes continue all the way out to the mufflers at the back of the car.

Here are the details:

• Dual 2.25 tubes flow more than the traditional 3" tube while producing lower sound levels
• 12.5% More internal volume than a single 3" tube for increased flow capacity
• 304 Stainless steel construction
• Uses OEM-type butt connectors that have slip and twist adjustment to allow the user to align the exhaust to user preference
• Brushed finish
• Quad 3.5" straight cut exhaust tips