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Old 08-18-2018, 01:41 PM   #65
drperry
 
Drives: Chevy Blazer
Join Date: Sep 2009
Location: Grande Prairie, AB
Posts: 300
The only way to make it quieter is to block/remove the NPP openings completely, lol.

My SS makes way less noise than my Duramax did, even with the fuse pulled, so my neighbours are happier, lol

I might try the stealth mode start, but I thought the NPP valves were vacuum controlled?


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