I think a have a magnet for this...........

 

fisherman, good to have you aboard! If you get 12+ while towing the lund you are ahead of me as I get 10.5-11.5 while NOT towing

If they see an increase in MPG and HP with the intake while normal driving you will see the same increase while towing, maybe not a drastic increase but it will definaltey not hurt any. Because your Lund is an aluminum hull it is a fairly light boat so it shouldn't affect the mileage much, I assume your lund is on a single axle trailer?