BMW 01-06 E46 M3 HPS Blue Reinforced Silicone Air Intake Hose Post MAF Tube replaces the stock OEM restrictive hose with high temp reinforced silicon material. Unlike other aftermarket air intake kits, HPS post MAF silicone hoses improve air flow and reduce heat soak while keeping the stock well designed air box perform at high efficient level. Without any re-tuning, the HPS silicone post MAF air intake tube delivers dyno-proven performance gains. This silicone intake hose does NOT trigger check engine light. Installation time is approx. 45 minutes.