As much as I love the GTS it’s very quiet even with the sports exhaust. Fortunately SharkWerks has a treatment for it
. 
This box came all the way from California, and should make all the difference..
The system is supposed to give 12Hp an 14Nm of torque due to eliminations of the U-bends in the original system.
The original system.
Easy to install in about 1 hour.
Now the car howls like nothing else and the extra power is really noticeable. Together with a new mapping from It´s Fun and BMC airfilters the car should have about 440 Hp.
Now I only wish that there was another 1000 revs on top.
The car pulls really strong from just under 3000 RPM and gets stronger all the way to the red line.
It´s still very sophisticated and GTS like with the smoth drivetrain that seems to be able to cope with any abuse from the driver.
A very nice package.
Time to find a new project….