Recently Josh purchased the ZZP SS M90 kit and installed it on his Grand Prix GT. Before the install he putted around in his 150k mile GT, longing for some more bottom end. Mods at the time were cat/Ubend/res delete and an open cone. A car like that dynos around 165WHP and pushes the dyno to read a peak of about 200ft/lbs of torque.

Josh installed our SS M90 kit himself. He ran upgraded to GTP injectors and a 4.0" pulley. With no other mods he dyno'd an amazing 253WHP and over 300ft/lbs! We are amazed by the power his car is making but more importantly Josh is smiling ear to ear. "It breaks the tires loose at 40!" is what Josh has to say out his kit.