This extension fits the following applications:3016P, 3027P, 3028P, 3042P, 3052P, 3055D, 3069D, 3070D, 3071P, 3072P, 3084D,3085D, 3086D, 3089D, 3107D, 3108P EASY INSTALL- Screws onto your existing can between the top and bottom with an O-ring seal. Capacity of oil separator increases to 6 ounces, very useful in the truck applications!