Valve, Vacuum Check, for 90~95 ZR-1 LT5. Sold individually. One (1) required per engine.  Located under the plenum, supplices vacuum to cruise contral & HVAC through the harness.

NOTE: This is a NEW, ACDelco part. This vacuum check valve is different in appearance from the original check valve on the ZR-1 LT5 engine. It is a newer design, direct replacement.