Earl's billet side mount oil cooler adapters are the slick way to add an oil cooler to your GM LS or Gen-V LT engine. The slim design of these adapters clear most headers and other components and feature -10 AN male connections. These adapters are black anodized and use O-Ring seals for a leak-free installation. The Gen-V LT adapter fits the Corvette, Truck, and Holley 302-20, 302-22 oil pans only. The Gen-V LT Truck engines require an extra spacer plate (1127ERL) between the oil cooler adapter and the oil pan to provide clearance from the adapter to the engine block. Choose from a standard adapter or one with a thermostat (180 degree is standard & optional 210 thermostat is available separately).