Smog block off plates

Smog Block-Off Plates

Smog block-off plates are performance components designed to eliminate the factory air injection system (AIS/PAIR) on motorcycles. By blocking off the ports that introduce fresh air into the exhaust, these plates help reduce exhaust popping, simplify tuning, and allow for a cleaner installation of aftermarket exhausts.

Commonly used in performance builds or track bikes, smog block-off plates improve throttle response and make ECU remapping more accurate by removing unnecessary emissions hardware. They are typically model-specific and made from high-quality aluminum or stainless steel for durability and a perfect fit.

Ideal for riders looking to streamline their engine bay and improve tuning precision, smog block-off plates are a simple yet effective upgrade.