If you have a D16Y8 that needs the 2nd O2, don't pay exorbitant stock replacement prices - just get one of THESE!
PERFECT for 2nd O2 for D16Y8 Civic - significantly cheaper than listed stock replacements while basically being the same part; only difference is it doesn't come with the chassis grommet, which isn't a big deal. Also, only NTK/NGK electrical parts in Honduhs for flawless performance, even if you're modded & making big power - don't cheap out with Boschs(work great in most domestic, work horribly in Honduhs for some reason) and generic ultra-budget relabels.