Collection: Auto - Secondary Air Injection

Restore your vehicle’s emissions efficiency and eliminate check engine lights with our selection of Auto Secondary Air Injection components. At DIY Customs, we provide high-durability electric smog pumps, specialized air injection check valves, durable air mass sensors, and heavy-duty plumbing hoses designed for a perfect fit in modern emission-controlled engines. Whether you are replacing a specialized failed air pump to pass state inspection, seeking a direct-fit diverter valve to fix lean-run conditions, or outfitting your engine with specialized gaskets and mounting brackets for a smog system refresh, our professional-grade hardware offers the airflow precision and OEM-standard durability you need at unbeatable prices. From specialized relay kits to direct-fit injection tubes for popular domestic and import platforms, we carry the essential gear for every emissions project. Don't see the specific pump model, valve configuration, or specialized vacuum line for your air system? Hit the live chat or call 412-882-8346—we can special order and drop-ship exactly what you are looking for directly to your doorstep!