Accurate AFR data is critical when tuning an engine. Running rich (very low air/fuel ratio, excessive fuel) can cause a loss in power, while running too lean (very high air/fuel ratio, not enough fuel) may result in serious engine damage. Using a wideband air/fuel controller during the tuning process allows you to monitor AFR and adjust tuning parameters to optimize them for maximum power and efficiency. AEM has a comprehensive line of highly accurate, reliable wideband air/fuel controllers that can help ensure your vehicle is optimally tuned. Warranty Installation Instructions
Delivery Times
Most in‑stock items are typically ready to ship or pick up within 2–3 business days after processing. Standard processing takes about 2–3 business days from when the order is received.Made‑to‑order and special‑order items require additional time. If an item has an extended ETA, it will be noted in the product description. For the most up‑to‑date ETA, please contact sales@smgspeed.com or use our live chat.