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**WIDESIDE72** · 07-03-2013, 08:14 PM

I had FM 40's dumping at axle on my 79 malibu w/383 and it was too loud. I have never heard complaint that 40's were too quiet. The 383 recently self destructed and i installed a milder 355.. I am also swapping the 40's for Sonic Turbos and tail pipes.
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07-03-2013, 08:14 PM	#11
WIDESIDE72 Senior Member Join Date: Aug 2008 Location: Cedar Park, Texas Posts: 7,500	Re: muffler question I had FM 40's dumping at axle on my 79 malibu w/383 and it was too loud. I have never heard complaint that 40's were too quiet. The 383 recently self destructed and i installed a milder 355.. I am also swapping the 40's for Sonic Turbos and tail pipes. Posted via Mobile Device