Old Skool,yes,I saw those.They look pretty nice too,Kinda "SHARK" like.But I already did that,

but I firmly believe that a good 2into1 system provides the best bang for the buck on a casually ridden bike.The twin pipes,high or low make nice top end or power in the mid to upper rpm ranges,whereas,I don`t normally ring my bike out,so I build mine for torque.