Injen Cold Air Intake STI (2015-2017) BMW Invidia's Racing catback exhaust for

Invidia's Racing catback exhaust for the WRX & STI feature 3" stainless steel piping with no resonator for optimal flow

there are delays in the ECU when determining when to open the valve

the ultra smooth interior surfaces of each tube remove intakes restriction that can otherwise hinder performance

Speaking of power

Injen Cold Air Intake STI (2015-2017) BMW Invidia's Racing catback exhaust forThe Injen Speed Pro series intake system for the 2015+ Subaru STI features special tuning technology for optimal performance gains and a safe A F ratio. The patent pending technology behind the Mega Ram system constricts the air intake at one point, and then maximizes airflow at other points to supply the maximum amount of air to the intake manifold. Injen SP intakes for the 2015+ STI are also specifically tuned for your STI engine and STI engine