Ford Mustang Forum - View Single Post - Headers - ARH vs. KOOKS
View Single Post
post #14 of (permalink) Old 02-17-2016 Thread Starter
crjackson2134
GT Member
4.6L Member
5.0L Member
S197 Member
 
crjackson2134's Avatar
 
Joined: Sep 2015
Location: Charlotte
Posts: 1,229
 
Garage
Quote:
Originally Posted by JBert View Post
I'm pretty sure you always need to tune for headers to get the best performance.

As I understand it, the issue with the CEL / emissions / O2's is that most "high flow" cats don't work very well, so the rear O2's register that they are not working and then the rear O2 has to be turned off to avoid that code / CEL. But that's a catch-22 because you cannot pass emissions with the O2's turned off, all sensors must be reading "ready"
Yeah, that was my worry since we have OBDII/emissions testing here. I talked with the tuner today, and he assures me that the car will pass all testing after the install. Hopefully he's a straight shooter here. He's not pushing a sale, and busier than a 3 legged man in a butt kicking contest.

https://www.facebook.com/ProDynoSC

Well, I guess I'll have to trust this and if it doesn't work out so be it.


2014 Black GT Premium 401A / Track Pack / Roush Phase 3 SC
2018 Black Nissan 370Z Nismo
crjackson2134 is online now  
 
 
For the best viewing experience please update your browser to Google Chrome