ENGPAR Sales Pvt. Ltd. Supplies Valve Guides with High Phosphorous Content. ENGPAR Sales Pvt. Ltd. Offers piston rings. Valve Guides with High Phosphorous Content are made from grey cast iron alloy to provide high wear resistance and improves working properties in poor lubrication conditions. Valve Guides with High Phosphorous Content are made to accurate dimension as per OE standards and the inner bore is also finished to perfect size. These are also made from brass as per the customer demand. These are applicable for automobiles, tractors, industrial & diesel engines.