Proflow 's LS RPM AirMax intake manifold kit allows you to bolt a carburettor onto your LS engine using Proflow's LS mid-rise carburetted intake manifolds. These intake manifolds work on all GM LS, Gen III, or Gen IV engines equipped with rectangular or cathedral port cylinder heads. these manifolds use an O-ring cylinder head mounting flange to provide an OEM seal and make installation a snap. You'll also receive mounting bolts, washers, and pipe plugs for the manifold vacuum and MAP sensor port anf Billet fuel Rail Kit .