615-610 Dorman Intake Manifold Upper New for Jeep Wrangler Grand Cherokee 99-04. DORMAN OE REPLACEMENT INTAKE MANIFOLDS. Optimize your engine’s output with Dorman’s OE replacement intake manifolds. Since 1918, Dorman Products has supplied the automotive aftermarket with high-quality replacement parts, hardware and fasteners. Performance ensured by extensive testing. Engineered with high-quality nylon, metal and/or plastic. […]