The 2013 is a strong bottom powerband pipe. The 086 will make mid to topend power and scream. I would say neither pipe is THE best pipe. Your track will depict which pipe works best for you along with how you drive. Small-medium track with technical jumps, 2013. It you have a medium to large track with run-up room to the jumps, 086. You'll have to actually run them on the track to find out. Thats why have some many pipes now!