Performance Distributors GM LS/VORTEC SOS Coils - Manual (Page 5)

Before we got to work installing the coils, we strapped the
car down on our
DynoJet 224xLC chassis dynamometer to
get some baseline horsepower numbers. Keep in mind that
our CTS-V already has the
Lingenfelter 378 CID LSA
Supercharger Upgrade and a larger Lingenfelter
intercooler package with dual 2-speed SPAL fans, so our
starting point is going to be a lot higher than the baseline
numbers for a factory car, obviously.
After making three baseline passes, the dyno graphs
showed us that our CTS-V Coupe has an output of 512.6
horsepower and 521.7 pound-feet at the rear wheels –
pretty stout, eh?
Installing these coils is about as easy as a speed part gets –
it’s a very straight-forward process that anyone even a
little bit mechanically inclined can tackle in about an hour.