Jeep Cherokee throttle body spacers give you a big boost in performance in both power and gas mileage. They are easy to install, bolting on between your intake tube and throttle body. Jeep Cherokee throttle body spacers feature an advanced bore design that spins incoming air into a vortex that does a better job mixing fuel and air as it courses into the combustion chamber. The result is, literally, more bang for your buck. And, although early Jeep Cherokee throttle body spacers sometimes caused an annoying whistle, modern spacers have overcome this problem.