they all do the same thing, they are all made of decent materials and all are shipped with jets (just make sure you ask for jets when you order, my kit had the jets left out accidentally, but had them shipped to me once i noticed they were missing.) the carb brace from bella corse is really nice, but to be honest the brace from BC does the job just fine as well. i am guessing you will be pleased with any kit you end up deciding on. the nice thing about the stock carbs is you can pretty much find those jets at almost any dealership (triumph or not) and they are cheap. if you want to save yourself a trip go to the shop and buy one size each above and below what they send you in the kit, or just buy them when you place your order and have the vendor throw them in the box with your airbox eliminator kit. should cost and extra $20-$25 for the extra four jets.