- Earls Plumbing LS0020ERL Oil Pressure Sending Unit Adapter; 1/8 in. Gauge Port;
Earl's GM LS Oil Cooler Block-Off is a billet cover that has an extra 1/8" NPT port that can be used for an oil pressure gauge or a turbo oil supply port. The 1/8 in. port is located on the top for extra header clearance. Includes billet cover, O-ring seal and mounting hardware.