Did mine today....oem plastic. Gonna buy brass for the next time...Replaced the heater T's with brass from home depot. The old ones both broke on removal, and I had to fish out little pieces. My 1999 with 175k miles definitely needed it or it would have probably stranded me pretty soon.
I did drop one of the damn nuts that hold on the engine cover and couldn't find it.....so I guess I'm going cover less . It was a pretty easy job, but uncomfortable trying to get the clips off the hoses leaned all the way into the engine bay
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