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Old 05-06-2013, 12:40 PM
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Exhaust Help

So right now on my wj v8 i have flowmaster 40 and new tip but all stock tubing. Do you think its worth me getting all new tubing, like 3"?

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Old 05-06-2013, 01:38 PM
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Re: Exhaust Help

I would advise against it unless you are going forced induction. The engine requires a certain amount of back pressure to optimum performance. The stock piping is 2 1/2". That is more than plenty of breath-ability for a naturally aspirated engine. if you are looking to gain more power try putting in a high flow cat for better breath-ability. I am running a high flow cat and a flow master 10 series with 2 1/2" piping.
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Old 05-06-2013, 05:46 PM
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Re: Exhaust Help

Chris your front end looks awesome finished. Let me know when you may have an extra set so I can do mine like that.
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Old 05-12-2013, 08:07 AM
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Re: Exhaust Help

The car geek in me has been following the 4.7 since it was introduced. Over and over dyno results have proved that the best exhaust combo for a modded 4.7 or the 4.7 HO is a 3" exhaust. Would you notice a difference in an upgrade from 2.5"? Likely not if you are not loaded with mods.

IMO - you money would be better spent somewhere else. A Superchips tuner or a custom tune would be a bonus. I have not done the SC on my WJ but ran one on my 4.7 Ram - it made worlds of difference, especially the transmission tune feature paired with the 91 octane engine tune. The trans tune paired with the "tow" tune was also very nice - it was designed for maximum torque which was helpful in a 5k lb truck.
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