I know that the DOHC 2.5 heads are the same as EJ20G heads and I also know that the newer coil on plugs can fit in them.
I dont have a lot of extra money so I am posting this here hoping that some of you may just happen to have a coil laying around.
The best price I could find on Nasioc was around 25$ each, meaning four for 100 which is probably a great price but a little too much for what is essentially replacement spark plug wires
