We carry both the Tubi and Larini...
The Larini exhaust is more of the high pitched Italian - Ferrari Formula One kind of sound, it costs less and has much better tips (double wall) than the tubi (single wall). The sound of the Larini is plenty loud but is quieter inside the car than the Tubi.
The Tubi exhaust is a deeper throatier sound, very loud, still italian, but a deeper sound that the traditional ferrari. It costs quite a bit more and is louder in the cabin, producing more resonance.
They are uniquely different and appeal to different people. We prefer the Larini but the Tubi is also a nice sound. We believe that the Larini should produce a small gain in hp over the Tubi due to the internal design, however we have not dyno'd the difference on the same car back to back to be certain.
I just ordered a Larini x-pipe (Tubi doesn't make one) which I will use in conjunction with the Tubi boxes. Will keep you posted...
Another dumb question: Can someone explain why if there are only two pipes coming from the engine to two mufflers, why there are 4 tips (2 per muffler)? I don't remember the model, but I believe there is a new one which has only two tips (large oval tip off each muffler). Is this just a design feature, or is there some performance issue?... The Larini exhaust is more of the high pitched Italian - Ferrari Formula One kind of sound, it costs less and has much better tips (double wall) than the tubi (single wall).