It was completely stock. It was on a dyno jet that my friend Jason had purchased for his shop. It Seemed to be accurate because a Buddy's civic with a B-16 swap and cold air put out 121 HP and that is typical for those cars.*shrug* We were playing around with it dynoing all of our cars for fun. That was the day that I had decided to gut my main cats and see the difference and I lost about ~10HP by doing that. It was in December and we were fanning air from outside to the car while they were pulling. It was about 10 degrees outside so perhaps that had raised the output a bit from what is normally seen from stock Zs. I had a few people tell me that there stock Zs put out about 250-255HP stock. *shrug*