HOLY CRAP!!!!! This cap is beautiful but it doesn't fit for nothing. The lip that sits on the O ring is visibly thicker than the OEM cap. Maybe 2 millimeters. I could not get the friggin retaining ring on at all. Got partly on but the rest of the ring would not budge. I ended up putting some dings in the aluminum and getting so pissed off i had to stop and come in here to find out if these things have to be placed in a press to squish down the O ring a little more to allow the retaining ring to fit. Anyone else have trouble with there install?