Performance Distributors GM LS/VORTEC SOS Coils - Manual (Page 8)

When we saw the dyno graphs after the pull we couldn’t
believe how much of a gain these SOS coils gave our CTS-V
– a gain of 26.4 horsepower and 24.1 pound-feet at
the wheels! That brings the CTS-V’s power output up to
539 horsepower and 545.8 pound-feet to the ground!
Conclusion
!
Performance Distributors’ SOS coil packs are definitely a
great upgrade to the factory ignition system, which is
actually really good to begin with. With the SOS coil packs
on our CTS-V, we feel a world of difference in response,
horsepower, it idles better, and actually does start up a
little quicker – we couldn’t be more pleased with the
product.