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Ronnie_l

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  1. Just signed up for the forum. I can't see where you purchased your headers. I've got a 2017 GMC SIERRA 2500 HD SLE 6.0 2wd. Looking to improve my fuel mileage. Wondering do I just do CATBACK or should I go full bore and do headers. I tow a 12,000 pound 5th wheel.
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