2011 RT challenger performance questions.
Well today is my birthday and I'm trying to figure out the next mod for my rt. I currently have slp loudmouths and a trinity tuner, and was thinking of longtubes. Some say they are worth it, others don't. How much horse power are those going to add? 25? Should I just go with hi flow cats or an offroad x? Also I was looking at the AFE stage II intake. Is the AFE worth modifying to fit my rt? Or should I just get a regular Arrington intake? I was tempted to add nitrous, but I want to hold on to the warranty a little longer. Any suggestions?