so i have a 1995 jeep grand cherokee laredo and i want a Flowmaster super 40 series...can i buy it with out worrying about compatibility issues? if not what is compatible with my car? thanks
Yes, it can work. just measure diameter of the pipe you have at each end of your current muffler, approximate length, and note if there is an offset. Flowmaster makes different sizes and offsets for different applications.
Or you can get this:
http://www.flowmastermufflers.com/shop/index.php?main_page=product_info&cPath=9_179&products_id=3936
It uses centered 2.5 in. inlet and offset 2.5 outlet, but is probably reduced on the inlet side to match up to what is likely a smaller factory pipe.