Exhaust "LTH ESC Team 2014" Vespa PV, V50, PK
This exhaust does not have the highest power or the widest band nor the best low down power.
So why do you need it then?
Because it distributes the power rise onto a large rpm range. This keeps your front wheel down while outaccelerating your opponent out of tight corners. The loss of 1-2 hp can be neglected on short tracks that are used in the ESC.
Minimum requirement is a Falc engine with 195° exhaust timing and a short transmission as it revs out at 12.500 rpm.