You've modified your Jeep engine for rock crawling, giving it more power. More power means more heat generation, which means you need a new cooling system. 4WD has heating and cooling components from 21 well known off-road brands. These include Flex-A-Lite, FlowKooler, Mr. Gasket Company, and RIPP Superchargers. In addition to the individual components, 4WD also carries complete kits like the engine cooling fan spacer kit or the auto trans oil cooler mounting kit. Whether you're riding an old-style Willys or the newest Wrangler, 4WD has solutions for all your Jeep electrical needs.