**** you need a big dust cap.. the whole cone are messed up.. bad quality.. go with DD directly //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif
This is RI's (DD's) # 405-239-2877 , if you go thru tech support then ask for Steve...VERY helpful and cool guy!! and if i may ask.....why are you wanting to put a DD carbon dust cap on a busted *** W7 sub that needs to be replaced anyway?