Thinking about stainless works catback

insidethreat07 · 07-29-2016, 09:57 PM

I have a A8 NON dual mode exhaust. I'm thinking about getting a stainless works cat back exhaust and was wondering if I get the kit without the AFM valves, I know it has a spot where the AFM hooks up but there isn't the valve on the inside, but will it throw any sort of code? Any advantages/disadvantages getting rid or keeping AFM?
I'm wanting to do the exhaust without throwing any codes.

Sledgehammer70 · 07-29-2016, 11:30 PM

No code will get thrown for the valve delete, but a code will get thrown without the 2ndary cats. The SW system does remove those 2ndary cats that follow the 02 sensors. They advertise the system as a 'Off Road' system. So to avoid CEL's you may need a tune.

jamminj007 · 07-30-2016, 04:29 AM

Quote:

Originally Posted by Sledgehammer70

No code will get thrown for the valve delete, but a code will get thrown without the 2ndary cats. The SW system does remove those 2ndary cats that follow the 02 sensors. They advertise the system as a 'Off Road' system. So to avoid CEL's you may need a tune.

I thought the secondary cats are not monitored. No O2 sensors on the secondary cats.

shrubby · 07-30-2016, 04:53 AM

Quote:

Originally Posted by Sledgehammer70

No code will get thrown for the valve delete, but a code will get thrown without the 2ndary cats. The SW system does remove those 2ndary cats that follow the 02 sensors. They advertise the system as a 'Off Road' system. So to avoid CEL's you may need a tune.

I didn't get any CEL after installing the SW cat back system. No tune either. Man does it sound terrific!

Darth Martel · 07-30-2016, 05:06 PM

From what I've read, those that have gotten a CEL after secondary cat deletion, they've discovered bad welds which caused a leak in the system. Those that have had proper welds when installing off road pipes in place of the 2ndary cats have had no problems with codes.

Quote:

Originally Posted by Sledgehammer70

No code will get thrown for the valve delete, but a code will get thrown without the 2ndary cats. The SW system does remove those 2ndary cats that follow the 02 sensors. They advertise the system as a 'Off Road' system. So to avoid CEL's you may need a tune.

1badrwd · 07-30-2016, 06:47 PM

I installed SW's full system(off road, no cat's) last week and i do not have any CE lights. I've put about 50 miles on it so far with zero issues besides all the neck injuries from people looking to see what the heck is coming down the road!

I haven't had it tuned yet either but will be doing so soon.

The afm valves are simply for to get better mpg's. Personally i didn't like it going in and out of V4 mode so that was the first thing i bypassed. I didn't buy the car for the mpg's anyway. you won't get quit as good mpg's by deleting it but to me it was worth it as its a V8 and that is how i want it to act all the time.

moonrider · 07-30-2016, 08:10 PM

Quote:

Originally Posted by Darth Martel

From what I've read, those that have gotten a CEL after secondary cat deletion, they've discovered bad welds which caused a leak in the system. Those that have had proper welds when installing off road pipes in place of the 2ndary cats have had no problems with codes.

Where did you read this? I have the SW exhaust and I keep throwing CEL

insidethreat07 · 07-30-2016, 08:22 PM

Quote:

Originally Posted by 1badrwd

I installed SW's full system(off road, no cat's) last week and i do not have any CE lights. I've put about 50 miles on it so far with zero issues besides all the neck injuries from people looking to see what the heck is coming down the road!

I haven't had it tuned yet either but will be doing so soon.

The afm valves are simply for to get better mpg's. Personally i didn't like it going in and out of V4 mode so that was the first thing i bypassed. I didn't buy the car for the mpg's anyway. you won't get quit as good mpg's by deleting it but to me it was worth it as its a V8 and that is how i want it to act all the time.

Dumb question, so if I would get the kit that deletes the AFM valve, would it always be in v8 mode? I don't care if it is, I am just wondering get if it somehow stops it by going into 4 cylinder mode.

insidethreat07 · 07-30-2016, 08:23 PM

Quote:

Originally Posted by moonrider

Where did you read this? I have the SW exhaust and I keep throwing CEL

Do you have aftermarket headers?

1badrwd · 07-30-2016, 09:14 PM

Quote:

Originally Posted by insidethreat07

Dumb question, so if I would get the kit that deletes the AFM valve, would it always be in v8 mode? I don't care if it is, I am just wondering get if it somehow stops it by going into 4 cylinder mode.

No, it would still kick the car in v4 mode you just wouldn't have the afm valves opening and closing. Not sure if that hurts anything or not regarding exhaust back pressure over the long term. I thought I read somewhere that it's okay to have it like this. I would just buy the afm range disabler and be done with it. It's only $100 or so and then you don't have to worry about it. That's the route I went.

shrubby · 07-30-2016, 09:32 PM

Quote:

Originally Posted by 1badrwd

No, it would still kick the car in v4 mode you just wouldn't have the afm valves opening and closing. Not sure if that hurts anything or not regarding exhaust back pressure over the long term. I thought I read somewhere that it's okay to have it like this. I would just buy the afm range disabler and be done with it. It's only $100 or so and then you don't have to worry about it. That's the route I went.

Does it work well? With the SW cat backs it sounds terrible when it switches to v4 and even in track mode it is constantly doing this in city traffic. I'd love to disable it. It takes up the obd port, right?

1badrwd · 07-31-2016, 02:04 AM

Quote:

Originally Posted by shrubby

Does it work well? With the SW cat backs it sounds terrible when it switches to v4 and even in track mode it is constantly doing this in city traffic. I'd love to disable it. It takes up the obd port, right?

Works great! Yes, you simply plug it into the obd port when the car is off and that's it. Your left with the V8 car you were wanting in the first place!

Darth Martel · 07-31-2016, 11:20 AM

plenty of threads here in the forum about that

Quote:

Originally Posted by moonrider

Where did you read this? I have the SW exhaust and I keep throwing CEL

Darth Martel · 07-31-2016, 11:23 AM

This is a good question/point. If you have the SW headers you WILL throw a code. You will need a tune to get rid of it and you should get a tune to take full advantage of what you're adding to the system. If you did the cat back exhaust or axle back exhaust you shouldn't be throwing a code and you don't need a tune. If you are throwing a code, that indicates a bad weld and you have a leak in your system.

Quote:

Originally Posted by insidethreat07

Do you have aftermarket headers?

07-29-2016, 09:57 PM	#1
insidethreat07 Drives: 2001 Camaro 3.8 Join Date: Jul 2010 Location: Continental Ohio Posts: 11,108 View My Garage	Thinking about stainless works catback I have a A8 NON dual mode exhaust. I'm thinking about getting a stainless works cat back exhaust and was wondering if I get the kit without the AFM valves, I know it has a spot where the AFM hooks up but there isn't the valve on the inside, but will it throw any sort of code? Any advantages/disadvantages getting rid or keeping AFM? I'm wanting to do the exhaust without throwing any codes. __________________ 2001 Camaro V6 2016 Camaro 2SS

07-29-2016, 11:30 PM	#2
Sledgehammer70 Lethal Camaro Drives: 16 2SS, 71 Std, Suburban RTS Join Date: Jun 2013 Location: Temecula, CA Posts: 3,855 View My Garage	No code will get thrown for the valve delete, but a code will get thrown without the 2ndary cats. The SW system does remove those 2ndary cats that follow the 02 sensors. They advertise the system as a 'Off Road' system. So to avoid CEL's you may need a tune. __________________ Thanks My Build Thread \| Lethal Garage YouTube \| Lethal Camaro IG \|

07-30-2016, 06:47 PM	#6
1badrwd Drives: 2016 camaro 2ss npp, A8 Join Date: Feb 2016 Location: Missouri Posts: 137	I installed SW's full system(off road, no cat's) last week and i do not have any CE lights. I've put about 50 miles on it so far with zero issues besides all the neck injuries from people looking to see what the heck is coming down the road! I haven't had it tuned yet either but will be doing so soon. The afm valves are simply for to get better mpg's. Personally i didn't like it going in and out of V4 mode so that was the first thing i bypassed. I didn't buy the car for the mpg's anyway. you won't get quit as good mpg's by deleting it but to me it was worth it as its a V8 and that is how i want it to act all the time. __________________ 2016 2ss- CAI, Ported TB, MSD intake, StainlessWorks LT headers & full exhaust- no cats, HP custom tune. M228 wheels, michelin pilot super sports 285/35/20 front, 305/30/20 back To be American is to love the flag, women, and sports cars!

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