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They're not when they're clean. Exhaust/carbon buildup... just needs a good cleaning. With the adjustable exhaust setup, the outside pipes tend to get dirty quicker.
The reason is it has the ~$1195 NPP option ("makes exhaust noise" and also adds 5 hp!) It's standard on some models.
The outside pipes have butterflies that are shut at certain times to force all exhaust to go through the muffler and exit through the inner pipes. At certain rpm's they open fully, essentially bypassing the muffler. (You can see them if you shine a flashlight in the outer pipes.) Hence the extra noise! When the exhaust goes through the muffler baffels and packing any black carbon if left there!
Hi,
Thanks for info, should I use Chrome cleaner?
whats best way to clean?
Thanks
Jimi
Just clean cold.
I use only a paper towel knowing that it'll start getting dirty again right away, and it takes only a moment or two, but some guys use various cleaners and polishes.
Get a Mother's Power Cone and some metal polish (they are stainless steel) for the first cleaning. After that you can fsvoboda does. I keep an ols microfiber hanging next to the car in the garage and wipe them off after each drive, it only takes several seconds. Here is what I used
You could go with a Borla S-Type Axle Back System With Ceramic Flat Black 4.5" tips. Just wipe them off once in a while with 303 Speed Detailer and they always look good. You can get them configured to work with the factory NPP system.
Last edited by ShadowGray19; 06-11-2019 at 06:45 PM.
I use only a paper towel knowing that it'll start getting dirty again right away, and it takes only a moment or two, but some guys use various cleaners and polishes.
I too clean when cold and simply use a couple damp paper towels. They still look factory new. Once and a while I use polish.
BTW OP really like the look of the perforated exhaust filler panel which I plan to add too. I plan to paint mine carbon flash metallic, stainless still looks great too and so much better than the mufflers.
Pretty much any metal polish will work. I used some 30-year-old chrome polish until gone. You can also use copper wool (like steel wool but copper) which will not scratch the tips.
I use Bead Maker on mine about once a week and there is no carbon deposits sticking to the tips. In fact after a week there still isn't any deposits, but polish with Bead Maker anyway. It must be some kind of miracle polish.
All the other products I used polished and shined quite well, but after driving I would have to wipe the tips.
Last edited by joemessman; 06-12-2019 at 03:47 AM.
I use wheel cleaner on mine whenever I wash the car. Cleans them up real nice and shiny and I only need to polish them every few months. If you're not going to use a hose to rinse the wheel cleaner off then you're better off with some of the suggestions above.By the way, the wheel cleaner trick only works if you've already polished them and you wash them weekly when you wash your car/wheels.
I just hit them with some detail spray and wipe them down with a towel.
That is what I do now! Started with my 2014 Z51 using "Flitz" I bought in a quart can for my street rod none coated aluminum wheels and all the other stainless (it has zero chrome, by design!)
Now I use the same detail spray I use for the rear and wipe it off quickly while they are warm. Just use a different towel. Looks almost as good!
I painted mine black with high temp paint...matches the rest of my car as well. This was the only polished piece from the factory anyways on my GS. No more black and silver exhaust for me....
Does running the z06 with the valves set too loud mode, fully open all the time, have any effect on the carbon deposits being only on the outside exhaust pipes?
06-11-2019, 07:53 AM
C7 exhaust pipes
