New Exhaust options and other suggestions.
 

I have a 2001 mustang base convertible with a 3.8 engine I believe. I want to know what I can do to make the idle sound "meaner". The exhaust is stock. It is not dual. Is there a glass pack "cherrybomb" or something cheap that I can do to make it sound better? I am already doing interior changes like red and black seat covers, lights, and outside underglow. I am looking for cheap options. I was also wondering if there is any cheap options for more horsepower? The car is completely stock. I hope this is the right section for this.