Well I'm considering taking off the Magnaflow and putting the Muffler Delete Option back on....I may ease into it with a 6 pounder for a while....see how much horspower I gain. My 99 with this option chipped and conical pulled well up high. It did seem to lose a little torque..but I figure the pullies will erase that loss.I really hate blasting those innocent folks though....Anyone running with just the cats with the larger pullies?