I recently purchased a 1988 528e BMW. I need some advice, Is is Normal to Hear the Muffler On these Cars? I noticed it has 2 (two) Exhausts not one like I have noticed on other Cars.As Soon as I excelerate the Interior Of the Car Becomes really loud, once The Car goes into higher gear it Lessons. My car is An Automatic Engine.Thank you in advance for your knowledge in this matter, Jodi