I just purchased a 15' Lancer GT with 13k miles. The exhaust the best way I can describe it has a very grainy sound. I'm guessing this is normal. But my question is, is it correctable? If not, am I allowed to replace the exhaust without voiding the warranty?

 

pictures... is it all original or does it look like aftermarket....

 

From first glance everything looks stock except possibly the tint. I can try to get it in the air tomorrow and be more specific. But wheels, air box, first glance at engine is still all stock.