I'll just jump right into it:

I was condireding purchasing powerful FR-layout coupe for quite some time...M3 (E92) was my initial choice BUT when I've came across CTS-V Coupe I knew it was the ONE. The car is simply incredible..the car has the one the best comfort/handling correlations - I use this car as a daily driver...and then there is the POWER...556hp/747nm from the factory. It just never fails to excite.

After I've driven the car for couple of months there was one major drawback - exhaust sound, or the lack of to be exact. For all the power the incredible LSA engine puts down it just sounded so dull..after some research I've sent the car to Netherlands to a tuning shop called Hammink Perfomance that are official dealers of Hennessey Perfomance in Europe. While tuning the exhaust, I've also decided to add a bit more power..though the car doesn't really need but why the hell not ;)
So the modification list included:
Henneseey V600 Package:
• HPE Cold Air Induction System
• Supercharger Pulley Upgrade
• 160 Degree Thermostat
• All Necessary Gaskets & Fluids
• HPE Engine Management Calibration
• Dyno Tuning & Road Testing
• Hennessey Exterior Badging
• Serial-Numbered Dash & Engine Plaques
+
• Corsa Sport Mufflers
• Electronic exhaust cut-out valve
• Painted brake calipers

So the car now puts down 610hp at the crank, and the sound is just epic..especially with the cut-outs open (though illegal to use on the street)