I have the stock headers and o/r/h, but i will be going with the longtubes and shorty h without cats. Will the longtubes make my car louder than it is now?
Seems odd, what is your combo, and how much power did you gain?
What size LT's and what size shorties?
What intermediate pipes did you have with the 2 different header combos?
Typically, Long tubes will make more power than shorties, especially at lower rpm.