Fit 08-15 Scion Xb Stainless Steel Semi-polished Manifold 4-1 Headers

Getting more air into your engine and more exhaust out is the key to a performance motor. That's where exhaust headers is significant as the first revenue of an exhaust system. When cylinders don't have to fight with each other to expel their exhaust, they can put more power through the wheels, pushing the vehicle.