Re: Srt-6 vs Infinity G37 S?
i would just get a single cai, you gain nothing with the dual cai. as for the modded exhaust, i have a straight through muffler and gutted rear cats and i picked up a few mph in the 1/4 mile and the 1/8 mile. the stock exhaust on the srt6 is actually very efficient.
if you made the mistake of going with a smaller diameter exhaust pipe or muffler like some on here have then yes your srt6 is now slower than stock.