The Air Crossover Connection is a component found that connects the intake manifolds on both sides of the engine. It allows air to flow freely between the two manifolds, balancing the pressure and ensuring an even distribution of air to all cylinders. This helps improve engine performance and efficiency by reducing exhaust emissions and increasing horsepower. The Air Crossover Connection is typically made of durable materials like steel or aluminum, and it's designed to withstand high temperatures and pressures in order to provide reliable service over time.