Thread: Want my NPP a little louder
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Old 06-19-2014, 09:22 PM   #14
cornerspeed92


 
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Drives: 2013 1SS 1LE
Join Date: Jul 2012
Location: Colorado
Posts: 4,188
Quote:
Originally Posted by AG1LE View Post
Headers require a tune (=warranty issues), HF cats do not. The HF cats alone make a big difference in sound, especially with fuse pull.
Any suggestions on which to run?
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