I've got flow masters on my V8 and they're pretty noisy. I saw a Magnaflow demo on the Power Tour and they produce a muffler that pretty well dampens the resonance. You might check with a dealer or go online. They had a pair hooked up to a big block and it was remarkably quiet considering. Paul Beck 65 Monza Crown Conversion Corsa v8registry PCCA Sent from my iPhone