Solid piece. A year in and no problems. Performs as specified.
The MDR washer cap is a great little accent to the engine bay, replacing that ugly blue cap. Easy and worth it.
I installed these in my 23 SI before I tuned it. I was nervous about the 1b1 method but it's held up so far after a few hundred miles and plenty of pulls!
Did my ARP head studs and installed this in the process. Just like advertised, the O-Rings keep the leaks away. Just wish you could see it more easily in there!