The Lexus IS250  just got a serious performance upgrade with an Injen intake  and a custom DYNO tune . This combination takes your driving experience to the next level, delivering sharper throttle response, more power, and an aggressive exhaust note—all while keeping your car street-legal and reliable. Injen Intake Upgrade Installing the Injen intake  improves airflow to the engine, allowing it to breathe easier. The result is faster turbo spool (if turbocharged) or improved