93_civic_hatch

well this is weird i have had a buddy club spec 2 exhaust for about a year and some cheep junky ebay headers (its loud)..lol any way i broke down and bought a set of buddy club headers and heat wraped them and now the the car sounds wild like a higher pitch wrx has anyone come across this problem or am i just worried about a problem that dont really matter is this normal...? the motor seems to run fine but that subaru thump just dont sound right on a civic.. oh i got a ls swap if that is relavent...