Hey everybody, I was just at Meineke today and asked the guy whether performance exhaust systems make a difference in power gains. The guy told me they're mostly for sound, louder, more aggressive sound! Now I have a stock '98 XLT V8 with only a MAC Performance intake. Now, is this guy yankin' my chain or is those figures mostly true? What I'm lookin for is more low end power with the MAC providing the higher RPM power. I also see an Apten chip in the future.