Atomic Airforce LS7 Intake Manifold Red Performance Polymer Intake Manifold For GM LS7 Engines MSD IgnitionThe MSD Atomic AirForce intake manifold delivers improved airflow and distribution to improve the performance of stock and modified engines. x000D x000D The unique bell mouthed runner entrances maximize airflow and minimize shrouding all while optimizing the available plenum volume for an unobstructed flow path over opposing runners. The polymer molded 2 piece design allows for easy access to the runners for porting. x000D x000D Atomic AirForce