You may be wondering what a ” Mud Indicator ” is… While running the Lake Superior Performance Rally ( LSPR ) in Houghton , Michigan in Late Oct 2011, we found out that we inadvertanly installed one. My co-owner and co driver Curt found out the hard way. When running down a mud soaked stage he suggested I hit the wipers to clear of the mud on the front windshield, in which I did. But the mud didnt clean.. He reached up and wiped a bit of it off from the inside.. Hmmmm Just then we hit a big mud hole and a stream of mud went up my co drivers pant leg and up on the dash and equipment.. Turns out the co-driver accidently dislodged the plastic floor plug. It was saled and taped the next day..