tape measure. Go buy one if you don't already have it. Jack up the back of your car and pull the tab of this mysterious device until it is at the correct length and decide for yourself if there is ample space. Really it is very simple.
Or, you can take it to a muffler shop and ask them. Also a very easy way to get your answer. It beats some jackass on the internet telling you it will fit knowing that it won't just so he can mess with you.