<<Any way to just get the bracket without the UNI filters?>>
Currently they are sold as a complete set...tubes, filters, bracket, hardware.
<<how do those tubes hold up too rock hits from the sides?>>
Rock impacts won't be any problem. The tubes are much stronger than they really need to be...matter of fact I have STOOD on one (as a demonstration) and I weigh about 170 lbs.
<<How does this give you more air than just clamping filters to your carbs?>>
The main advantage over using 'pod' filters clamped to the carbs is that the weight of the carbs and filters is being carried by the bracket...not just by the intake boots. Also, the length of the velocity tubes forces the airflow to be more linear when passing through the carbs. Another advantage is that it increases the length of the intake tract by almost 12" (to the backside of the filters). To understand why this is beneficial, CLICK HERE to go to the FAQ on Toomey Racing's website. Near the bottom of the page there is an explaination after "Q. Why is there a "Rich Spot" from 4000 to 5000 RPM, and how do I get rid of it?"