How fast stock 370Z really is and how will BERK and K&N's affect on that!

AlphaSnacks

0-100KMH = 0-62MPH = slower than 0-60MPH. You'd be surprised the difference 2MPH can have on a time.

European tests are done using 0-100KMH.

Journalists use GPS based equipment to measure distance traveled.

Journalists also launch using torque-braking on automatics (revving to 2.5K RPM before launch) or clutch dumping at 4K RPM on 6MTs.

1/4 miles and 0-60s are also measured with 1-foot rollouts, which is why when people try this mounted logging equipment they get results that are significantly higher than what people actually achieve on a real 1/4 mile strip. It's no myth that a 370Z can hit 60MPH in high-4s, easily. Just look at the 1/4 mile times some of these stock cars run, low 13s and high 12s?

Also, OP I see you are in an area of Macedonia that is 800-1000 feet above sea level, that hinders performance quite a bit. And I also doubt your petrol is as clean as what we have in the US, for example. So your car could be running on our equivalent of 90 or 91 octane.

Basically, there are too many factors working against you and the times you are hoping to achieve. Even your tires are different than what is offered in the US car.