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gmw0181 · 10-10-2018, 08:34 AM

I have the cat-back from Stainless Works with NPP and AFM delete. I did not feel any power difference but its louder and sounds great. Nice having NPP valves but I always keep mine open.
One thing I can add, if you keep the AFM turned on the car sounds like crap in V4 mode in my opinion. It is very noticeable switching between the two with the cat-back with AFM delete. I think if you buy the cat-back with the AFM valves it would not be as noticeable on the highway. When I bought my Camaro SS I always planned to disable AFM.
Nov 5th I am taking my car to Stainless Works to have their long tube headers and high flow cats installed.
2017 Camaro SS A8

10-10-2018, 08:34 AM	#4
gmw0181 Drives: 2017 Camaro 2SS A8 Join Date: Dec 2017 Location: Ohio Posts: 137 View My Garage	I have the cat-back from Stainless Works with NPP and AFM delete. I did not feel any power difference but its louder and sounds great. Nice having NPP valves but I always keep mine open. One thing I can add, if you keep the AFM turned on the car sounds like crap in V4 mode in my opinion. It is very noticeable switching between the two with the cat-back with AFM delete. I think if you buy the cat-back with the AFM valves it would not be as noticeable on the highway. When I bought my Camaro SS I always planned to disable AFM. Nov 5th I am taking my car to Stainless Works to have their long tube headers and high flow cats installed. 2017 Camaro SS A8 Last edited by gmw0181; 10-10-2018 at 08:35 AM. Reason: Spelling