Invidia [15-21 WRX/STI] Q300 Single Cat Back Exhaust | HS15SW4G3S Performance ECU Upgrade to the REV9 Race-Spec

Upgrade to the REV9 Race-Spec Front Mount Intercooler Kit and experience cooler intake air

please reuse original)

Integrated 1/8” NPT port for coolant temperature sensor

5 cm M6 bolts for installation

Invidia [15-21 WRX/STI] Q300 Single Cat Back Exhaust | HS15SW4G3S Performance ECU Upgrade to the REV9 Race-SpecThe flat bottom shaped muffler design results in improved high speed aerodynamic performance. The muffler inside contains continuous piping design and use of Advantex material that results in an excellent free flow exhaust with optimized back pressure, giving greater horsepower, torque gains and a rich deep sporty sound. The use of SUS304 polished stainless steel piping, mandrel bent to shape, state of the art CNC machine made flange, Robot TIG