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05-13-2023, 02:38 PM
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#1 |
 Drives: Camaro lt1 Join Date: Mar 2022
Location: Pennsylvania
Posts: 11
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What's that blob inside a new exhaust?
Service recently replaced a faulty exhaust with a new OEM NPP exhaust on my '21 v6. First, is it normal that a new exhaust seems rusty inside? Secondly, what's that blob or residue inside (better seen in the second close-up picture). It doesn't want to come off and it's hard. Thanks!
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06-15-2023, 02:44 PM
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#2 |
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Pills are for Pansies
Drives: 2023 2SS Red Hot Vert Camaro Join Date: Jul 2008
Location: Citrus Springs FL
Posts: 1,296
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Valves that get louder in S mode, stay quiet in T mode.
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06-15-2023, 03:20 PM
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#3 |
 
Drives: 2023 Camaro Convertible 2LT Join Date: May 2023
Location: NJ
Posts: 147
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The blob looks like a weld?
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06-15-2023, 03:27 PM
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#4 |
     Drives: 2017 Camaro 2SS A8 Join Date: May 2019
Location: USA
Posts: 1,656
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That “rust” looks like heat from welding. The inside of the tips can be cleaned up with a good stainless polish and a polishing cone in a hand drill.
https://www.amazon.com/Buffers-Polis...dDbGljaz10cnVl https://www.amazon.com/Chemical-Guys...s%2C161&sr=8-3 As mentioned, “the blob” is your NPP valve.
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Originally Posted by arpad_m - “Aww, yet another oil thread with almost the same question in the OP“ |
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