It follows the large scaled turbine which led to the birth of the 90ÏÜ series. 
This volume and the minimum ground level are within the safety standard conformity. If combined with the Front Pipe PRO II it will be a step it up to the exhaust for race circuits. 

(SILENCE-VX PRO peculiar part ) 
It is aimed to increase torque in the mid-low speeds by improving the length to the "F" Pipe part and making it's chamber shape. Also, this achieves a higher response during high speeds by changing the main pipe's diameter to 90ÏÜ.
(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 be installed) 

*For race circuits only

Price

Remarks

NISSAN

SKYLINE GT-R

JPY 178,000

For race circuits only

JPY 83,000

Even Length Type