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Old 09-01-2014, 10:37 PM
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Aussie Mike Aussie Mike is offline
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Join Date: Jan 2001
Location: Sunbury, VIC
Cobra Make, Engine: Rat Rod Racer, LS1 & T56
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Mine are 4.5" diameter for the muffler body and 3.5" diameter for the collector and tip. The cats I use are a 4" diameter body and won't fit inside a 4" pipe.

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Mike Murphy
Melbourne Australia

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