Holden By Design

[mickey]

I bought a Berlina with Holden by Design enhancements. the placard under the bonnet has a set of codes that obviously determine the features on the car. I know that my berlina has HSV wheels as standard and sports suspension and some color coding.

I am curious as to whether HBD imp[roves the power output of the motor, changed exhaust etc...

If anyone could help that would be great.

cheers