I bought an induction kit for my 2.0 DOHC Saph this morning. I have fitted it and taken her out for a drive. She sounds very throaty under throttle

Thing is, is she ok to have an induction kit? She has done 104,000 miles with no histroy. What worries me now is that i could be putting more stress on the engine with high mileage. I only bought it as it was reduced in Halfords.