pozi240
Well-Known Member
- Joined
- May 6, 2019
- Threads
- 5
- Messages
- 52
- Reaction score
- 130
- Location
- Ottawa, ON
- First Name
- Andrew
- Vehicle(s)
- 2023 Mach 1 700A HP 6M FJG, 2023 Lincoln Aviator
The factory muffler (and tips) on our cars is T409 grade stainless (very hard and decent). It is NOT chrome. Rather, the tips have a high polish to them. What you see happening is dirt and carbon deposits that have been allowed to sit too long on a very hot exhaust. A lot of the suggestions in here will work, but, at this point, you need to get aggressive with it. I have used actual wet/dry sandpaper in various grits (start with medium grit - 400 or 600) and work up or down depending if it is coming off. Once it comes off (and it will), then get out the "NeverDull" or Flitz, etc and start polishing it up.
When driving aggressively (HPDE or track days), I will clean and wipe off the tips right afterwards to prevent this type of thing. I've detailed many nice cars for friends and colleagues (997/ 991 , M4's, C63's etc etc), and I've seen this type of build up and worse. Sometimes you swear its coming from underneath, but, with 409 stainless, that is impossible. Frustrating, but, you can't hurt the stainless tip getting aggressive with it. Just have to polish out the scratches afterwards.
You should be at least wiping out the exhaust tips after almost every long drive (I know, a minor pain but........), and this will never happen.
When driving aggressively (HPDE or track days), I will clean and wipe off the tips right afterwards to prevent this type of thing. I've detailed many nice cars for friends and colleagues (997/ 991 , M4's, C63's etc etc), and I've seen this type of build up and worse. Sometimes you swear its coming from underneath, but, with 409 stainless, that is impossible. Frustrating, but, you can't hurt the stainless tip getting aggressive with it. Just have to polish out the scratches afterwards.
You should be at least wiping out the exhaust tips after almost every long drive (I know, a minor pain but........), and this will never happen.
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