Most Liked Negative Review
Don't Use Without Applying RTV Sealant
The base has a rubber O-ring to seal the connection to the intake manifold, It leaked antifreeze BAD. Removed the water neck and compared to the same product I purchased approximately 12 years ago from Speedway (which I had been using for 12 years without any problems). Note: I only purchased the new one as I was detailing the motor. Anyway, the new water neck base where it connects to the manifold is only half the width of the old one; i.e, twice the sealing capability on the old water neck. Used RTV sealant (in addition to the rubber O-ring which you didn't have to do on the old one) and it works fine. Also, no "made in USA" scribe on the new water neck (or on the box) so I assume this must be an Asian knock-off!