EGR delete plug (ONLY) for Driver's Side manifold, the same design as the AIV delete plug but w. a smaller diameter to match the air tube that runs to the EGR. This lets you cap the opening on the manifold if you are removing the EGR system.
"Full" EGR delete kits w. blank outs for the plenum and caps for vacume tubes also available.
The AIV system is the source of a familiar gurgle sound in the fenders of 90-92 300ZX, many people remove the system and even Nissan themselves dropped it by 1993. Current ECU codes from JWT and Ash turn the system off by default as well.
This is the clean solution for people who need to have stock cats in place for emissions or don't want to run test pipes but want to fully remove the AIV system. This set of plugs cleanly caps the openings on the sides of 90-92 stock catalytic converters and allows you to gut the entire AIV system.