Exhaust Gas Recirculation valve. It pushes exhaust gas into the intake to lower combustion temps and in turn lower emissions.
Hmotors engines are great, dont get me wrong. If you want a remaned engine, buy the H22, have it shipped to us in dallas, we can rebuild it for you hone and everything. the problem is the H22 has fiber reinforced sleeves that do not like to be resurfaced. so if you want new pistons you have to either get honda OEM pistons, or we have to sleeve the block ($1,000 for a H22) and then buy pistons and rods...thats just for the block. We cant port and polish heads, but we can clean it up and install new components if you like.
If your dad is up for that, give us a call.
Allen Motor Sports
(214) 391-7562