I have had soo much trouble with the corks, rob is no-doubt ignoring my emails, lol. Torque is hard to get right on these, for me. If the threads bite a little then 5lbs or even 10lbs is clicking off and I am not even close to contacting my intake. The 3M spray does help with placement, but if your plenums are not seated properly then all is lost. they are holding as of now, but I know they are torqued too much. So another set goes on, if I can find them.