All cars are different and all dynos are different (some read low others high), and you shouldn't compare your car to other peoples cars.
Did you get a base dyno run ie when the car was stock, no mods?
This is essential if you want to gauge how your mods are going and it should be on the same dyno.
By just adding a header (especially one without a cat) you are not going to see great gains...
Dyno readings are not everything...
How does the car drive...

 

I didn't put the car on dyno when it was stock. actualy the car drive is great but when I raced with stock MC S i didn't pass him that much

 

Could German mapped the ECU give mid performance because hot weather country and didn't map it high performance I'm not serious.

 

 

Good Citizenship rules

Also as much as you'd love it, federal and state laws don't apply to that bloke in turkey.

 

Just joking Rusty and Silent1

 

Good point. Didn't notice that. Either way, running without a cat so you can get 4 HP is retarded.

 

You may be surprised how much power is needed to make a significant difference in a drag race. The minor difference between an S and S JCW is about as much for you to have the experience you did to only beat him by a little bit.