Add to Favorite Sellers. LS0013ERL Earl’s LS Side Mount Oil Cooler Adapter. LS Side Mount Oil Cooler Adapter w/ 212 degree thermostat; 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. Choose from a standard adapter or one with a thermostat (212 degree is standard & optional 210 thermostat is available separately). Customer Service & Feedback. So we have a chance to make it right – we want your repeat business! Check out the official Holley Performance. For more great deals!!