Hey. I am very new to the mods. I got a 92 Honda Civic LX with EVERYTHING stock. What mods should i add (in range of $500) to get better performance and acceleration. Explaining would be nice since i dont know much about the parts yet. I know about Cold Air Intake. Also, what would make my muffler really loud and heavy sound. Like, you know, the one that you hear almost everyday on Civics. How much would it cost to get a loud muffler. Thanks. I hope for some good help. Thanks a lot.