Features a larger plenum for increased airflow, and smooth radius turns to reduce turbulence and intake pressure losses. BD’s unique design positions the fasteners outside of the manifold (instead of through it) to reduce airflow restriction, and two convenient ports (one pre-tapped) make it easy to monitor boost and/or inject nitrous oxide or another power adder. Now available in both black powder coated and highly polished aluminum finishes. Use it with our X-Power Intake system for even greater airflow!