bought 10 of these beasts. Installed 2 on the 45* elbow that leaked before, and added 2 more to the coupler at the mid-intercooler level (doubled up by leaving the original ones on too since there was lots of room)
I'll install others later. Lets see if I fixed the leak. It seems like it would hold boost at 5psi in 3rd gear, but as the RPMs went up, the boost wasn't going up on my run today