Just some ideas...
The Dynomax Ultrflo are supposed to be on the quieter end but with good flow.
Towards the bottom of this page, there is a chart comparing the various series of Flowmasters. The 60 series appears to be on the mild end of the spectrum. There is a video on muffler selection as well....
I have Borla on both my truck and my Roadmaster. They're pretty mellow. I like them...
An H pipe, if you have room, can help make it mellower.
The Dynomax Ultrflo are supposed to be on the quieter end but with good flow.
Sounds of Dynomax
DynoMax® Performance Exhaust is a leading brand of stainless steel exhaust systems, cat-back systems, axle-back systems and stainless steel muffler technology. DynoMax® Performance Exhaust has a complete line of mufflers, including the Ultra Flo X stainless steel muffler, Ultra Flo Welded...
www.dynomax.com
Towards the bottom of this page, there is a chart comparing the various series of Flowmasters. The 60 series appears to be on the mild end of the spectrum. There is a video on muffler selection as well....
Flowmaster Official Site: Mufflers and Exhaust for Legendary Sound
Flowmaster® is a household name, and for good reason. They've built legendary exhaust systems and mufflers for decades, and now offer performance air intakes, catalytic converters, and headers to give your hot rod performance to match the iconic Flowmaster sound.
www.holley.com
I have Borla on both my truck and my Roadmaster. They're pretty mellow. I like them...
Borla® Universal Stainless Steel Mufflers, Resonators, & Parts
Borla offers several Universal Muffler lines to suit your specific needs. They share many of the same features as the mufflers used in our Cat-Back™ and Axle-Back exhaust systems. Including austenitic stainless steel construction, a free-flow design for improved performance, and more.
www.borla.com
An H pipe, if you have room, can help make it mellower.