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Exhaust pipe size

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Old 02-18-2015, 12:29 AM
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Default Exhaust pipe size
What size is the exhaust pipe where the cats are is it 2.5 or 3. From the rear cats and crossover pipe
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Old 02-18-2015, 01:14 AM
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2.5 inches
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Old 02-18-2015, 01:36 AM
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Depends on engine. If it's a 4.2 it's 2.25" if it's a 4.6 it can be either 2.25" or 2.5" and if it's a 5.4 it's 2.5"
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Old 02-18-2015, 10:01 AM
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Thanks. I forgot to mention it is a 5.4
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Old 02-18-2015, 11:58 AM
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Originally Posted by FCVFD
Thanks. I forgot to mention it is a 5.4
I'm pretty sure the reason for the 2.5 inch pipe is to help all that 350 LB/Ft or torque stay at around 2500 RPM's for pulling and towing.
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