Celica T-Sport , Audi S3 , scania r series
Don't think so because your exhaust manifold is at the rear of the engine bay and the Astra H exhaust manifold is at the front of the engine so it maybe too long.
Its a jam thing
Haec credam a deo pio, a deo justo, a deo scito?
It could be made to fit, you may need a Miltek adaptor pipe as the turbo system is a bigger bore.
Tell me what you've done, not what you're going to!