I think he's the first to have those DP,also he might be the first one to install them in an hour and letting them cool down,cause my first set on a lift took me two hours not being familiar with the setup and my car was relatively new and still had a hard time removing those bolts and o2 sensors,and had to purchase a pry bar for better access,my 2nd set took me a little over an hour cause of the antiseize which made it easier for removal of all the bolts and o2 sensors and also having the proper tools such as the long extension and prybar,made life a little easier the 2nd time around,guess your more skilled than me cause to me personally basic is changing the plugs which took me an hour the first time.