B-man - Thank you - It is nice to know I can use as large as a 20" muffler. I am using a straight thru design (no chambers) to eliminate back pressure and to not lose performance. I want to use as large as possible to keep drone and excessive volume down as it is a convertible.
Considering one of these three based on muffler performance tests that I have read.
Dynomax ULTRA FLO™ WELDED - OFFSET / OFFSET
17749
Xlerator Performance Muffler Stainless Steel 2.5" O/O 4x9 Oval - XS1266
Jones MF1266
I was set on the Race Pros until I have received conflicting testimonials of unwanted drone and excessive noise. Some people really like the Race Pros, some don't like the at all. I believe the smaller 14" oval case will not dampen the volume enough.
What is the muffler you use that gives you a 20" case?
I thought I would ask here because when I research the larger mufflers the manufacturers claim they are not compatible with the 67 GTO.
Comments welcome.Thanks for your advice.
Mark
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