Fujitsobo Authorize RM Catback 2015-2021 WRX / 2015-2021 STI

A fresh option in a sea of more common catbacks! 

Fujitsubo engineers and designs quality exhaust systems designed to improve the power and performance of your vehicle by replacing your factory equipped exhaust with a high-performance unit that features smooth bends and increased piping diameter. These features limit the restriction of the factory exhaust system to provide an aggressive exhaust note throughout the entire RPM band.

Here are more details:

• Authorize RM Cat-back Exhaust model
• Stainless steel construction
• Designed using a chassis dynometer, and a 1/3 octave band sound analysis device for development
• Manufactured using 3D laser processing machines and automated pipe benders along with CCD cameras, image analysis software and 3D CAD
• Lighter than OEM for weight savings
• Improved horsepower, torque, along with improved throttle response and reduced turbo lag
• Exhaust hangers welded onto the OEM location to make for a direct fitment
• New gaskets included making this exhaust system ready for the installation