Plenum, Intake Manifold for 90~92 ZR-1 LT5. One(1) plenum is required per engine.

NOTE: This is a NEW, GM OEM part. All connector tubes and cool air purge hoses are installed

NOTE: This plenum is configured for the 1990 model but also is fully machined for the EGR Pipe connection which didn't appear on production models until 1993.  The 1990~92 plenum casting did feature the EGR Pipe connection, just not machined. This specific plenum DOES HAVE the finished EGR connection. VERY UNIQUE! Can be used on 93~95 models with EGR & by replacing of the fuel vapor cannister purge vacuum pipe, or on 90~92 with EGR block-off plate.