| ive cored my trackday pipes , i used the ducatisuite method but took a bit more care than they when making the hole inthe end. drill round it and open it up with a file, it releases the propper sound and allows much improved gas flow, i run an open pipe chip with this and it runs fine.
i wasnt able to source the perferated tube necessary to go the other method. but if you could always do this in the future if you were unahappy with the ducatisuite method | 
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