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Discussion Starter · #1 ·
Went to the dealer today to look at new trucks. Are the LBZ's quieter than the LB7's? The new LBZ was quieter cold than my LB7 was when it is warmed up.
 

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Yeah, put an LB7 next too an old 12 valve Cummins and you'll never complain again.
 

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I own both a LB7 and a new LBZ and the LBZ can hardly be heard next to my LB7 at idle. At highway speeds the LBZ is very noticably quieter too (Maybe more sound insulation).
They have come a long way, I thought back in 01' when my LB7 came out it was super quiet.
 
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