It is. I installed a STS kit on a Tundra...on the dyno i think it made like 27hp/36ft.tq. It was a piece of shit. Plus there was all sorts of piping running under the truck and no intercooler or anything either.

The crossover pipe is a much more user friendly and efficient way of getting the turbo to spool at LOW RPM and making power. Ofcourse there is also the need for two custom manifolds...but those make power by themselves, over the stock "log-style" manfolds used on most factory turbo kits.