Originally Posted by rorr

It's been stated in other threads that the GM Turbo Upgrade kit is a really good base upgrade to start with. It makes sense, since it didn't affect the factory warranty. Coupled with the fact it bumprd the power to 290 HP and torque to 340 lbs/ft, it might be what you're looking for.

Originally Posted by firemangeorge

The numbers for the HHR SS are 290 hp, 315 ft lbs torque with the GMTU kit.
(340 ft lbs is for the Soltice, Sky )