LS1 Gen 3 LS Billet Valley Cover (Knock Sensor Delete)– CNC machined billet Aluminium engine covers for additional strength and appearance. Features CNC machined ballnose surface finishStrong billet design Knock Sensor Delete$349.00 Options Anodising (+$50.00) LS1 Gen 3 LS Billet Valley Cover (Knock Sensor Delete) quantity Add to cart