Located on top of the HEMI block, you can't miss these four plugs in the valley. These are for engines without MDS.
If you're building a MDS 5.7L/6.4L HEMI motor and you want to fully delete the MDS system, you'll need 4 of these to replace the MDS solenoids on top of the block.
Stock MOPAR quality, these are OE replacement parts. 53032221AA
Complete sets require a quantity of 4 plugs.