Join Date: Apr 2002
Location: Houston (Clearlake), TX
The 46mm is the direct replacement. The standard 46 has full fins and there's a special 46 for the 930 that has shorter fins to give more clearance for removing the valve cover. The special one is another couple hundred dollars and I don't know if anyone actually buys them.
2014 Cayman S
2011 Cayenne Turbo
1979 930 (475 rwhp at 0.95 bar)