Anybody ever run Imco or Land and Sea Extension Boxes on a
Fastech hull? What were the results as far as handling, coming on plane and speed increase?

I can not speak for improvement that it made on Phantoms 38 footer but I can say that I did drive it and with the boxes that boat was a DREAM to drive!!! Man even if it did not go faster ( I heard they were good for 5mph??) The handling was great on that boat. He has 500hp's

My Buddy is running a 38' 2002 with Teague 800's and extension boxes. Boat handles extremely well, even at 100mph