aimed to increase torque
in the mid-low speeds by
improving the length to
the "F" Pipe part and
making it's chamber
Also, this achieves
a higher response during high
speeds by changing the main pipe's
diameter to 90φ.
(Since Front Pipe PRO II is
catalyst-less, it is for car racing
only and not legal for street use.
Moreover, if it is not combined
with the Silence-VX PRO, it cannot