I would sugest Looking up your header manufacture and ask them.sorry for confusion.
im talking about the o2 wire sensor extensions
seen here: https://www.texas-speed.com/p-17122...9FKmOVO2c2oiLIzDgaseARtzOwsgmRVxoCkrcQAvD_BwE
wondering how many i'm going to need for these headers, but yes trying to pass emissions.
post cats also already have spacers installed