I have a 2006 Dodge Ram 1500 with the 5.7liter Hemi. It now has 105000 miles on it and, except for air filter changes and routine maintenance, the intake system has not seen any service. Sorry but i get the creeps when I have to deal with repair shops. I just don't trust them. The truck still has plenty of pep although it is beginning to show symptoms of a dirty MAF and my Highway mileage is actually worse than my city mileage. This I will be resolving today with an air filter cleaning and change as well as a TB and MAF cleaning and its associated sensors. My question is at this stage of the game am i too late for a chamber cleaning? Will one treatment of the combustion chamber cleaner be enough to thoroughly clean those areas it's targeted for our should I apply a second treatment at some point in the near future? Would it make a difference if I let the cleaner work longer than the 15 to 20 minutes (one of your competitors recommends their product be left to soak overnight). Lastly, can the application kit be used for some of your other products such as the injector cleaner? I was planning to use it with the "venturi" vacuum from the inside of the throttle body similar to the way one of your competitors uses their injector cleaner to use your injector cleaner. Thanks for putting out such great products for the "shade tree mechanics" that cherish the value of their buck. -Alex