Hey, so i bought my camaro with a fm 80 series. i wanna replace the cat with a muffler and the run a y out the back ( i like the dual outlet look) anyway i was thinking of using a flowmaster 40 series. I know backpressure is bad and i can imagine that type of muffler creates more than a magnaflow. But this is My daily car and i cant go faster than 35 in town so i wanna keep some low end at the cost of high end. Anyway has anyone done this before? if so how did it sound or work out?