antidrainback valve as they call it on some the sites... Here's a fairly good site. Or you can just do a search on ph8a check valves or filter tests, you'll come up with lots of tests and they usually state which brand has a valve and which brands don't...




Quote Originally Posted by Bruno
Bill, do you have the p/n or any cars that are using a filter with a check valve inside and is compatible with PH8A?

I had a toyta part #: Landcruiser Large 15600-41010 3.75" 5.45"
But I am not sure if it has a check valve inside...

http://mywebpages.comcast.net/jonmar...rt/ofilter.htm

Well I am due for my oil change before the track and I will install one of my new plates on my car instead of the prototype so I will try to take some close up pictures.