I ordered the afe drop-in dry filter and WAS thinking of a magnaflow muff to replace the stocker. Then reading about how the flowmaster is actually MORE restrictive than the stock? WTF? Do I even need to replace the stock when I replace the air filter? Trying to optimize the flow through the whole system. I had used a magnaflow on my '07 DC with V6 and I saw about another mile per gallon but was using the same air filter. That truck with auto trans. Any thoughts on these changes as an optimization of the whole system?
Magnaflow was louder than stock but I wasn't just crazy about the sound...mainly did it for hopeful mpg improvements.