I have 2 Piccos, and i like this engine. I was racing in our nationals last summer and i installed Picco with a Buku pipe, but in the middle of the race, the end cap of the buku popped out, just because of that i finished the race in the last place. After the race i looked inside the pipe and i saw that the threads on the inside of the pipe body was good, but the threads on the end cap were skinned. After that i got a Jammin JP-4, but the performance was not like buku. I tried Jammin JP-2 too, but nor liked it too. So which pipe do you advise me to use with Picco P3 28?