As some of you know, a good friend shipped his CS to TPC for the installation of its turbocharger kit and some other work. Considerable time and energy was spent by TPC over several months to tweak the installation and the car was returned a few weeks ago. On paper, the results seem incredible: 423 RWHP (from 266 stock) and 359 ft-lb torque (from 230 stock). Using a 12% drivetrain loss ...


