LA Engine Intake Manifold (273)

the shield was put there by the factory to keep oil from burning on the manifold. the center port in the head is a heat riser port or heat cross over ive heard it called.if you plug the heat riser port then the heat wont get there and it wont burn the oil and the shield is not necesary. some times there already plugged because of carbon build up.if you plug it you can gain some ponys but the down side is the engine idle changes a ton from hot to cold.a compromise you can decide on.the shield might help keep the manifold a little cooler if the shield is on there and the heat riser is plugged.i made my own shield before dont know if they make them.