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Discussion Starter #1
I've read that if you put headers and the cat back system, then I believe update the computer, the performance of the 5.7L Hemi really comes alive. I was just wondering if these additions add to, or hurt, gas milage?

I have an 05 R/T with about 44K miles on it.
 

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Somehow i missed this post. Yes, any mod where the engine breathes easier=nog.... As long as you drive it like an adult.
 

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Auto spell check must be in the holiday spirit..

Nog=mpg
 
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