I am new in forum and I have a Astra turbo coupe z20let with turbo vxr decat pipe and kn!

I have a problem when the car gets hot with the car still throws a bit of white smoke but it is the night when the cooler!

When walking to the car to speed up and then throw no white smoke is good!

It appears that is so good after the turbo throw shooting seems that all the smoke out and is good!

The Turbo vxr is new have 2 months!

What we think may be?

Help me