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 Quote:
What is the difference between a Walker Quiet Flow, Sound FX and Pro Fit muffler?

A Walker Quiet Flow muffler is a 3 tubed design, premium muffler that is designed for O.E. equivalent sound and precision fit.

A Sound FX muffler is a 2 tube design muffler, with direct fit designs that are O.E. equivalent.

A Pro Fit muffler is a high quality universal fit muffler for installer shops and fabrication uses.



http://info.rockauto.com/Walker/Detail.html?128-673.jpg
So the Sound FX is more or less a Dynomax muffler welded up for direct fit. If those were available in 2006 I would have gotten those instead of the quiet flows.


Edited by Chevyguy (06/23/09 10:04 AM)
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2004 MarauderM79 155K miles Jmod!! Rockin Stock tune Daily, Muscle Merc tune for track 14.85 @95.63
2004 Crown Vic LX SOLD!!

New Daily 2016 Dodge Charger R/T Road and track, purchase with 16K now 23K after 3 months. 5.7 Hemi, 8 speed ZF trans 3.06 open rear 13.98 @ 99.2 mph 4740 lbs with driver!!

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Project car 74 Chevy Laguna type S-3, # match 400 SBC
Previous rides
93 P-71 2001 P-73, 94 TC Exec, 96 TC Signature, 04 LX