Guys i have an exhaust system on my car but the dumb guys at who welded it on put it on wrong and its broke and rattles now so i jus need a new muffler but i didnt kno what to get what sounds the deepest or the best but i have heard the megan n1 muffler and its nice but i was wondering if anyone knos how much it would cost to run 3" back from the cat

 

Unless you plan on doing some more modding to your car stick with a 2.5". You won't have enough exhaust backpressure and you'll lose some low-end torque.