Ok so there is a separate thread around exhausts and my recent Borla S Type purchase/install. I’ll keep that thread up to date on those details.
I learned just today that I originally had a stock exhaust, non “Z51” option … so while I was able to move over the AFM valves , there was no NPP actuator valves to move from old to new. SUPRISE! I had no control over exhaust volume/sound despite what my dash allowed me to change in Z or my mode .. it did nothing. I thought it did but my stock exhaust was so damn peaceful .. I guess it was hard to tell
lol (see other thread)
However my tech told me there appeared to be the wiring in place for the NPP valves … so good news?
I need 2 NPP actuator valves …. HELP
I also learned that I might need the “Z51” RPO code in my ECM to make it all work.
So I have a new scan tool enroute , as well as I’m about to send my ECM to be unlocked (HP Tuners) and between the two I should be able to add the Z51 RPO code (if required) … TBD
So the science part here is I might be able to crack the C8 non Z51 optioned cars to allow for NPP (exhaust volume control) when an after market exhaust is installed and supports AFM/NPP
Seems no-one has tried or cracked this one yet, despite many threads on the topic. I’m now that clown willing to attempt it for the greater good of all C8 owners.
Has anyone pulled a stock Z51 exhaust , and not reused their NPP valves, that is willing to send along to me for the science project? (I’ll pay shipping)
I could buy them, but yuck
. I know there are exhausts sitting out there with the valves attached, that are not being used …
Let me know … and thanks !
And yes .. I need help, serious professional help
I learned just today that I originally had a stock exhaust, non “Z51” option … so while I was able to move over the AFM valves , there was no NPP actuator valves to move from old to new. SUPRISE! I had no control over exhaust volume/sound despite what my dash allowed me to change in Z or my mode .. it did nothing. I thought it did but my stock exhaust was so damn peaceful .. I guess it was hard to tell
lol (see other thread)However my tech told me there appeared to be the wiring in place for the NPP valves … so good news?
I need 2 NPP actuator valves …. HELP
I also learned that I might need the “Z51” RPO code in my ECM to make it all work.
So I have a new scan tool enroute , as well as I’m about to send my ECM to be unlocked (HP Tuners) and between the two I should be able to add the Z51 RPO code (if required) … TBD
So the science part here is I might be able to crack the C8 non Z51 optioned cars to allow for NPP (exhaust volume control) when an after market exhaust is installed and supports AFM/NPP
Seems no-one has tried or cracked this one yet, despite many threads on the topic. I’m now that clown willing to attempt it for the greater good of all C8 owners.
Has anyone pulled a stock Z51 exhaust , and not reused their NPP valves, that is willing to send along to me for the science project? (I’ll pay shipping)
I could buy them, but yuck
. I know there are exhausts sitting out there with the valves attached, that are not being used …Let me know … and thanks !
And yes .. I need help, serious professional help
