You can't get more classic than a Polar Silver 996 C4S and the owner of this prime 2003 example came by for our bolt-on power kit, which included the EVOMSit Software (tuned for 91 octane), the EVOMS V-Flow intake system, the IPD Plenum and a Cargraphic Exhaust.

Here she is ready to go under the knife:


Out comes the factory airbox, throttlebody and stock plenum in preparation for the IPD Plenum kit:




In she goes:


And completed now with the V-Flow intake:


Next up, we remove the quiet factory exhaust:




Migrate the tips over to the Cargraphic:



And ready to go home!



Here's what she sounds like with the Cargraphic Sport Exhaust:
http://www.youtube.com/watch?v=FPd1EQW7y4o

 

10hp if he adds our painted bumperettes.