Jan 7, 2012 #1 m7 carver Active member Joined Mar 10, 2011 Messages 116 Reaction score 13 Location stony plain Has anybody had one and did it make much of a difference? Thanks.
Jan 7, 2012 #2 G geotirsledder Active member Joined Nov 15, 2009 Messages 31 Reaction score 9 Location calgary Website www.geotir.com Had one on a 2008 M8...didn't see any difference at all.
