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If adding headers, why not go ahead and add some good hi-flow cats?!

To get the most out of headers, you need to also get uprev.
 

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Instead of a "generic" tune, they will custom tune your truck for the mods you have added.

You can data log your truck and send it to them and they will adjust the tune for best performance. You can also get 5 other tunes to suit what you are doing. Track, towing, valet, etc.

http://www.uprev.com/
 
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