friend had a dual magnaflow on his ford focus and i thought it was way too loud. I could hear him from a block away, and now, he wants to sell it cause its too loud. He has 2 18" resonators in there on each section, and its still that loud. Jschmid also told me that his magnaflow was obnoctiously loud at fwy speeds when he had the 18" resonator. I wouldnt go for magnaflow, but thas just me. They make good stuff for trucks i think.