AEM silicone hose couplers are designed to connect air intake tubes for racers, builders and fabricators to create custom ducting for turbocharger systems and air intakes. AEM couplers are constructed from reinforced, multi-ply silicone that can withstand very high working temperatures. AEM silicone hose couplers are designed to connect air intake tubes for racers, builders and fabricators to create custom ducting for turbocharger systems and air intakes. AEM couplers are constructed from reinforced, multi-ply silicone.