Advice for Exhaust - FABSPEED or SOS

[NSXPich]

Hello,

I have a 2020 NSX and was looking for advice on which to go with based on opinions.

I kindly ask if anyone has received a CEL code for these applications with the stock exhaust?

I came from a Z06 Corvette and would love some additional sound; that is my primary goal.

My concern with the catless downpipe from Fabspeed is the CEL code.

I also posted this in the perf mods forum; I believe this forum may be more active.

Thank you in advance!

 

[DMacNSX]

Hello,

I have a 2020 NSX and was looking for advice on which to go with based on opinions.

I kindly ask if anyone has received a CEL code for these applications with the stock exhaust?

I came from a Z06 Corvette and would love some additional sound; that is my primary goal.

My concern with the catless downpipe from Fabspeed is the CEL code.

I also posted this in the perf mods forum; I believe this forum may be more active.

Thank you in advance!

You will get a cel with no cats. No need for catless. I went with science of speed downpipes and a jb4, being installed this week.

Sent from my SM-G970W using Tapatalk

 

[drmanny3]

I have debated whether or not to go with the JB4. I am only hesitant as back when I had my 2001 NSX-T, the car ran lean by design. With a supercharger I had to be careful in running a mix of 100 octane racing fuel plus regular 91 octane, otherwise I would get pinging. I had a lot of people look at the car. I kept the fuel pressure high so that I was dumping fuel into the system so that I might not run too lean. The 2001 NSX met a very stringent emission target that the 2000 and earlier cars did not. Even Comptech when they installed the supercharger noted that the car was running lean. While I have not heard anything with respect to the JB4 device. I am being over cautious. There are settings that require higher fuel octane ratings. SOS even offers a methane injection that cools as well as improves detonation. I am really happy with the SOS Downpipes and for the time being will hold off doing anything else.

 

[phaphaphooey]

Get on the FB group as there is tons of discussion there. Catless will throw CELs which may impact performance. SOS and GRP are gold standards, I went with Redstar as they cut me a deal in exchange for some promo material I shot for them. They are 95% the same, even use the same HJS cats, although SOS recently changed theirs since the 2019+ are more apt to throw CELs even with cats installed. Don't waste your money on the muffler replacement.