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The OE exhaust on the ZL1 is fairly loud when you get on it. I would say that MBRP race is going to be way too loud. The NPP is nice that you can set it to Tour mode and be respectable when cruising...
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2019 ZL-1 Acquired 4/23/21 at 6300 miles. Riverside Blue, A10, PDR. Traded in 2017 2SS with 6M and 32k miles. Continental Extreme Contact Sports. Now has 10,000 miles...
2012 Yukon XL Denali w/ 6.2 AWD
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