Secondary Air System

Secondary Air Injection Delete

The secondary air injection system injects fresh air into the exhaust during cold starts to bring the catalytic converter up to temperature faster. On tuned engines, this system can be cleanly disabled.

The kits sold on Hubshop.fr include machined aluminum plugs, adapters and the hardware needed to physically block the system without triggering residual fault codes. ECU tuning generally includes disabling the system in software at the same time.