I tried the longer one but my reception was always terrible. AM was unusable because of static and lousy reception with both the OEM and the replacement. There is a TSB about the mount, but it didn't do too much when the dealer fixed it. So, I installed one of these on the windshield. It isn't too noticeable and the reception is unbelievable.

http://www.midwestelectronics.com/bl...nna-p-507.html