04-11-2012, 10:21 AM
I'm looking to do a tune up on the Z28 I just acquired, more of a preventative maintenance kinda deal, and the o2's are one of the things I want to replace. I've read about Densos and will probably be going with a set from Amazon, as someone said they bought a set for around 38 a piece on there, however I don't know which ones to go with. Amazon says both the 234-4087 and 234-4025 sensors fit, but which ones should I get for the pre-cat sensors? Thanks.