These VHR long tube intakes, designed for 2008-2013 Infiniti G37 and Q50 3.7 models, feature a 2.5-inch diameter for enhanced airflow. They deliver a straightforward performance boost of 10-20 horsepower without requiring any tuning. Engineered for easy installation and reliable fitment, they optimize engine efficiency and responsiveness, making them an excellent upgrade for enthusiasts seeking measurable gains with minimal modification.