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Old 05-09-2015, 07:07 AM
jbdangeranger jbdangeranger is offline
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Default Dual Exhaust System

Hey all, I've got a 2003 4.0 XLT 4x4 and I'm looking into redoing the exhaust. Thinking about going to duals with a high flow cat and flowmaster 10 or 40 (haven't decided). Any problems, solutions, or thoughts I should know about? Any help is appreciated!
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Old 05-09-2015, 07:37 AM
Logan03CO Logan03CO is offline
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Default Re: Dual Exhaust System

Is there a reason you are changing your catalytic converters?
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Old 05-09-2015, 09:57 AM
jbdangeranger jbdangeranger is offline
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Default Re: Dual Exhaust System

I'm just not a fan at all with my stock cats, and they're starting to rust out. So figured might as well change it.
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Old 05-11-2015, 02:10 PM
Saves Saves is offline
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Default Re: Dual Exhaust System

if they're rusting out really bad, then its your call to replace or not. if they're in any way structurally sound i would keep them. they're better quality than most aftermarket or "high flow" cat, and you wont see any performance gains from switching to them.
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Old 05-11-2015, 03:21 PM
riscorpian riscorpian is offline
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Default Re: Dual Exhaust System

For what it's worth, the aftermarket cats I switched to were significantly lighter than stock. That alone makes it worthwhile in my book, but it really depends on whether or not weight loss is that much of a factor. If you have a 4x4 extended cab or something, then I doubt weight is of primary concern.

Anyway, Gibson's dual exhaust has proven to be a really good bolt-on option. Just keep in mind that it's designed exclusively for extended cab. I assume you already have that, but if not, it will not fit without some modification.
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