On my way to home depot at lunch today I was stopped at a light waiting to turn left. In the left lane, a silver Trailblazer SS pulls up to next to me with a "396 SS" license plate and tinted windows. The light turns green and we make our left hand turn... we both punched at around 15 mph and it's f-ing on! We were nose to nose until about 50 mph and then he slowly started pulling on me until around 80-ish where we shut it off. He ended up about two truck lengths ahead of me. I have a 2 deg timing adv, 87 BD tune, and exhaust.