Yes for the exhaust side it was ok, was able to put the blanking plates on. For the inlet side, I think the studs need to be removed as the threads are not long enough for a nut to tighten on the blanking plates. I will try the heat method as described above.It's been a few years, but my recollection is it wasn't necessary to remove the studs - you use them to mount the plate. If your blank has two mounting holes, one will go over the stud and receive a nut and the other hole gets a bolt. In fact it's probably easier to mount the blank as it can hang from the stud while you get the bolt started - way less likelihood of dropping it multiple times while trying to maneuver in that very tight area back there.