Head's up when you buy these folks. I got this one from Pelican Parts and the entire thing is bent/warped. It was MTC brand which AutohausAZ also sells. Here's the new one (left) and older one (right) held flat against a fence post. You can see how the bad one is not a straight piece like it should be.
So, when you bolt it to the two holes on the block the all-important seating face makes a huge gap!
I ended up reinstalling the old one which has about 30,000 miles on it, plus a new o-ring.