Review on 🚀 Enhance Performance with Mr. Gasket 2668 Replacement Water Neck O-Rings for Chevy by Micheal Wright

I have been using this system for several years now and it is the cleanest way of sealing a thermostat housing that I have. You MUST have the correct housing with O-ring channel. I was under the impression that they could be reused as might be stated on the product packaging for the thermostat housing but the o-ring will not seal if you try to reuse it - which is why I bought these replacements and am getting the reason no 5 stars. No dirty RTV, no fingers crossed, both surfaces are absolutely flat. When replacing, do not scrape the RTV or gasket material from the air intake or housing. Simply pull out the old O-ring and insert the new one.