2005 Audi A4 aFe Cold Air Intake. aFe Cold Air Intakes Features - The aFe Cold Air Intake System is custom-built for your specific make, model and year vehicle. Increased airflow instantly boosts acceleration and overall engine power. For increasing levels of performance, aFe Air Intakes come in 1 or 2 stages:. Stage 1: Replaces factory air box and air filter. Stage 2: Replaces factory air box, air filter and intake tube. AFE Intake Systems, AFE Intakes, AFE Cold Air Intake Stage 2, Stage 1. For the top selection of Audi A4 2005 aFe Air Intake Systems shop online today. The AFE Intake Systems, AFE Intakes, AFE Cold Air Intake Stage 2, Stag... [Read more]