91-99 Nissan 200sx Sentra Altima Air Intake MAF Adapter and Red Air Filter It comes with a cone washable & reuseable 3" air filter, 1 Clamp and MAF Sensor adapter Average 5-7 % increase in horsepower & torque Gives better air flow, deeper sound Easy installation with right tools (direclty bolt on) A new Universal 3" Red Air Filter with MAF Sensor adapter kit for 91-99 Nissan 200sx/Sentra/Altima