These intake manifolds improve the engine's air filling efficiency with the help of the integrated velocity stacks (bell mouths). The advertised power increase is approximately 6% when measured on a dynamometer.
Attached is the dyno graph of a TMAX 560 equipped with an Akrapovič Racing exhaust, Over Range transmission kit, sport air filter, and the original ECU map. This power gain is provided as an example and may vary from one machine to another.
The tubular section is made from rubber to provide flexibility, while the velocity stacks are manufactured from high-temperature rigid plastic for maximum durability and performance.
