what he said ^^^^
also dont change your catback exhaust or add flowmasters, your ears will bleed and you will come back on here saying "i changed my mufflers and they are now too loud and I hate it"
flowcrappers = chambered mufflers, you dont want those. FInd some NON chambered mufflers, like magnaflow, borla, slp or any turbo style muffler.