The Super B Single
is great for towing because it will spool up as good, if not better than the stock turbo which improves drivability, it will also give you a lot more air flow to keep the EGT's down when towing with your Predators & Smarty jr. If you are over 425-450HP and are towing heavy you will start making too much heat with just the Super B Single, that is why we recommend a sets of twins when over 450HP.
When you are reading that the single is not good for towing, you are probably reading about our larger single, the Super B Special.
Although this turbo is great for large amounts of air flow up 550HP it is larger so gives up some spool up time, which results in some lost drivability compared to the smaller Super B Single.
Both singles can be upgraded to BD Twins Turbo kits and we are developing a single turbo that is in between the Super B Single and Special but production is about 6 months away on that
The benefit the Super B Single has over the 06 stock turbo is efficiency (not size) meaning it will still respond fast but produce a denser charge of air. Unlike the stock one the compressor wheel is designed to rotate at a much faster RPM the reliability factor also goes way up!
An BD Cool-It Intercooler
upgrade with the smaller single can also brdige the gap on EGT's instead of going with the larger Super B Special Turbo.
Hope this helps