I know this topic has come up before. But here it goes, i have a 68 coupe with 50 series flowmasters- the older style non Delta flow. and my problem is that it is LOUD. it sounds great but it is really loud at idle and drones at cruise- 3200 RPM. It is especially loud at 5:30 in the morning when i take it to work. I dont want to wake up all of my neighbors and kill my hearing anymore than it already is. Does anyone think that the new style flowmaster 50 series delta flow, or magnaflows will quiet this engine down a bit. my engine is a 351W with AFR heads, Edelbrock perf. rpm cam and manifold, 750 holley, 2800 stall converter, 2 1/4" Exhaust with an H pipe. thanks....