+1 on the past posts, if you just want a more agressive sound tho, go with a borla or frpp axleback. theyre basically the same muffler, just depends on what you want to see stamped on the exhaust tip, borla or ford racing. i went with the borla cuz i had the extra $, and i havent looked back since. definately go with atleast one of those choices. heck, swap the whole system and go duals would be even better. also get a tuner and a CAI.
2006 4.0 V6 Mustang/X Charger #128
Mods: Too many, check out my profile.
Probably currently under modification... My wheels are for sale! Look in the classifieds!