When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I have the stock NPP exhaust and installed these, you do get a bit louder idle. There must be a fair amount of back pressure on the “open” exhaust with the valves open as there is still a lot of exhaust coming out of the inner exhaust tips.
How long did it take to get yours? I have been on backorder for two months even though there website says there are 7 in stock, ANDREW PASIK will no longer return my emails giving me an update on what is going on, if I call I get the same story, we have some coming in the next day or two and will mail them out to you! They have been saying that for two months, I even got an email saying they were shipping out to me and the tracking number would be forwarded to me, they never shipped me anything.
Hey Richard,
Your was shipped out Thursday which I emailed you about on Friday.
Im sorry this took longer than normal, these are made by hand by our tech and he has been knocking out big wholesale orders of these while trying to get out retail ones made as well.
Do you have several unanswered emails to me? I know there was the one from last week which I apologized about but Im not seeing anything else.
Your was shipped out Thursday which I emailed you about on Friday.
Im sorry this took longer than normal, these are made by hand by our tech and he has been knocking out big wholesale orders of these while trying to get out retail ones made as well.
Do you have several unanswered emails to me? I know there was the one from last week which I apologized about but Im not seeing anything else.
‘21 C8 Z51 with Stainless Works Redline exhaust with functioning NPP valves. Cicio AFM modules did nothing to remove the idiot light unfortunately. No real information as to how I should troubleshoot the issue on their site or in the shipment. No other mods on the car aside from the aforementioned catback. Any advice would be appreciated. Fair warning that this purchase may be a “pet rock” situation.
Last edited by Mpullee; Nov 12, 2022 at 04:26 PM.
Reason: Grammar Error
Here's a question. What happens if installed on a factory NPP exhaust? Would it make it louder at cruising or idle? I'm hesitant to go with aftermarket exhaust or cats due to warranty but want my car louder. Miss the days of the front engine vette where a CBE wasn't a warranty concern. Thanks
Louder in which setting. In another thread, someone disconnected the valves, and wired them to stay open. That person reported that the perceived sound was not louder than just cruising with the exhaust sound setting to track mode, which can be done in MyMode, Zmode, or default in Track mode. He also reported that it sounded terrible in V4 mode, which could be avoided if the engine trans setting is track. So, he decided not to go that route.
