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Old 12-31-2016, 08:01 AM   #1
BigAlForsyth
 
Drives: 2012 ZL1 AGM, 67 C10 5.3/T56,93form
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ZL1 factory NPP exhaust packing blowout after mods??

So I was washing my car and looked into the tailpipe and thought there was a live animal in there!! Turns out the packing material in the NPP stock muffler is coming out. So I do have Forza controller and do keep it closed quite a bit. Defect or not designed to host that much power at WOT??
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Old 12-31-2016, 08:32 AM   #2
BigAlForsyth
 
Drives: 2012 ZL1 AGM, 67 C10 5.3/T56,93form
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Quote:
Originally Posted by BigAlForsyth View Post
So I was washing my car and looked into the tailpipe and thought there was a live animal in there!! Turns out the packing material in the NPP stock muffler is coming out. So I do have Forza controller and do keep it closed quite a bit. Defect or not designed to host that much power at WOT??
Hey stupid why don't you search first:
http://www.camaro5.com/forums/showthread.php?t=264328

Sorry didn't see this before
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2012 Ashen Gray ZL1 M6 LSXperts Stage III
-LSXperts Stage 3 cam, LTs, pulleys, 850cc, Rotofab
1967 Chevy C10 5.3/T56 on air
1993 Pontiac Firebird "Thunderchicken"
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Old 12-31-2016, 08:59 AM   #3
DrkPhx

 
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^^^ Lol. Mine didn't do it until I was heavily modded. It sometimes has the NPP rattle on cold start up if the flaps are closed (I have an ADM exhaust controller).
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Old 12-31-2016, 01:09 PM   #4
ZMEnow
 
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Quote:
Originally Posted by BigAlForsyth View Post
So I was washing my car and looked into the tailpipe and thought there was a live animal in there!! Turns out the packing material in the NPP stock muffler is coming out. So I do have Forza controller and do keep it closed quite a bit. Defect or not designed to host that much power at WOT??
Doesn't matter if you are modded or not. Mine went at 3400 miles with no MODS but CAI.
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Old 01-03-2017, 08:31 AM   #5
lbls1


 
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Very common for GM exhausts. Its perfectly fine; You won't have problems, as a matter of fact the exhaust may get louder.
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