The WIX 51758 Oil Filter is a heavy-duty spin-on lube filter designed for easy installation on the front of a vehicle. Made with enhanced cellulose media material and a 25.00 micron rating, this filter provides efficient filtration with a flow rate of 28-30 GPM. The filter does not include an anti-drain back valve and has a burst pressure of 275 PSI, ensuring reliable performance. The metal filter housing and screw-on mounting style make it a durable and convenient choice for maintaining your vehicle's oil system.MISSING O-RING!!