Originally Posted by ClimberClint
Can you post an example or two of pipes tuned to capitalize on the low end differences in the camshafts versus making HP? Are there general types of exhaust systems that provide more of one or the other (i.e. 2 - 2 vs 2 - 1) or are they specific to the pipes models/makes themselves?
I'm not familiar with all the pipes out there, but most are set up to open things up and allow the bike to flow at higher RPMs. In general, exhausts that make the most low end are ones with smaller primary pipe diameters and longer primary pipe lengths...these maximize scavanging at lower rpms.
On the intake side, you can also tune to maximize torque by increasing the intake tract length.