ARP box is marked Honda D16 but they're too long? WTF?
It's pretty rare, out of a civic gx, high compression from factory, made to run natural gas.I have never heard of a D16B5 stateside......
How serious are you about stacking washers? It's like 1/2" till the threads start, thats a lot of washers.time to stack washers.....!
grade 8 or titanium......lol either works
that is odd though, maybe the b5 has a shorter head height to add to the compression....?