ok so over the past few months i have noticed that when i get out of my car I am smelling a more than usual amount of exhaust fumes. what could be causing this? sorry to be so vague but I dont know what else to say. I am running a stock header/cat/exhaust. could it be the head gasket?

 

Either have a hole somewhere or maybe your timing is making you run rich. Have you checked your timing recently? Good idea to do so. Advanced timing seems to make engines typically run richer...