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Active exhaust actuators part number??

32909 Views 47 Replies 9 Participants Last post by  HellaciousFish
I recently purchased a 2015 Challenger Hellcat and the previous owner installed a Flowmaster exhaust, (I don't which type).

Anyways, the previous owner cut the active exhaust actuators completely out, and just left the lines dangling... it's no problem to drive or anything, I just hate seeing this stupid MIL light. Plus I can't remote start my car for longer than 10 seconds before it shuts off because of the light.

When I bought the car I didn't think finding these parts would be this difficult , but it is...

Does anybody in this forum know what the part numbers are for the left and right active exhaust actuators?

I would.loke to purchase a left and a right actuator and then get the AES kit and install it that way.

Any help will be much appreciated

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Both should be same part number.
You will need actuator 68230108-AG
And spring 68319331-AA
Hopefully this helps.
Thanks for the quick response!


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If the previous owner installed a full cat-back Flowmaster exhaust (as opposed to just splicing in some mufflers), it should have the valve eliminators already on there, so you shouldn't need anything but the actuators/springs. Check pic below to see if yours has something similar.

View attachment 200449
this is correct, I will need to buy each actuator and the AES kit to get rid of the code.

I will get some pics underneath this weekend, when get some time.

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this is correct, I will need to buy each actuator and the AES kit to get rid of the code.

I will get some pics underneath this weekend, when get some time.

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I say this, because my exhaust doesn't quite look like that, it is flowmaster, but I didn't see those brackets...

I will take some pics and post them this weekend.

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Do you think then your car may not have been tuned?

~Linda
That's what I'm guessing at this point...
I'm thinking dyno and tune are in the very near future

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It's hard to take better pics without a lift, but here is what I could get...



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Hey tac,
Might want to check with a dealer on part numbers just to confirm. Out of curiosity I watched the aes video. In it he stated the actuators have different part numbers. The one I gave you was passenger side. Sorry for the confusion if I caused any.
I only know that number because mine was replaced ( pass side only).
I looked up the part numbers and they differ left and right, but you got me headed in the right direction, thank you!

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Flowmaster only has 2 choices for the Challenger HC, basically differing in the mufflers (big cans like in the pic above, or skinny ones), but either should have the brackets that the actuators bolt to and function as a simulator. It allows the actuators to go through their motions/test to avoid throwing a code. Did someone modify the stock system and cut out the stock mufflers and valves and just install some mufflers?
Hope you get it worked out either way!
I'm thinking he cut it out, unless im looking in the wrong spot, I posted some pics, let me know what you think

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Well it looks like a complete Flowmaster cat-back (has the proper H-pipe) "Outlaw" system (AKA "damn loud"). I double-checked (see the Flowmaster site) and while there are 2 "American Thunder" options and 2 "Outlaw" options, the pics are basically identical (perhaps in error??), however it seems that only one of each type indicates an "active exhaust" provision. If that is the case, and I'm not sure why they would even offer one without the active exhaust solution, then perhaps you have one without it? I can't quite see in your pics if the bracket for the actuator is there or not. They would be past the rear mufflers, just beyond the exhaust hanger, on the outside of each pipe, like in my picture posted previously.
Did they cut the actuators out or just unplug them? Are they tied up somewhere to the underbody (sorry if I am stating the obvious here)?
Otherwise, like you've said, you will need the left/right actuators and AES kit, or alternatively, look into a different cat-back or try and find a local stock take-off exhaust assembly. Sucks either way. :oops:
I stand corrected, I wasn't looking far enough back...

They are both there... just the wires were cut for some weird reason

So this narrows down my problem, I just have to reconnect them, easy peazy!


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Well it looks like a complete Flowmaster cat-back (has the proper H-pipe) "Outlaw" system (AKA "damn loud"). I double-checked (see the Flowmaster site) and while there are 2 "American Thunder" options and 2 "Outlaw" options, the pics are basically identical (perhaps in error??), however it seems that only one of each type indicates an "active exhaust" provision. If that is the case, and I'm not sure why they would even offer one without the active exhaust solution, then perhaps you have one without it? I can't quite see in your pics if the bracket for the actuator is there or not. They would be past the rear mufflers, just beyond the exhaust hanger, on the outside of each pipe, like in my picture posted previously.
Did they cut the actuators out or just unplug them? Are they tied up somewhere to the underbody (sorry if I am stating the obvious here)?
Otherwise, like you've said, you will need the left/right actuators and AES kit, or alternatively, look into a different cat-back or try and find a local stock take-off exhaust assembly. Sucks either way. :oops:
Thanks for the help!

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Thanks for the help!

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Oh and yes, these are extremely loud! Every tunnel I hit here in Portland is a deafening roar when I go through!

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Ok so here is the problem I am running into now... I found where the wires were cut.

Where do I connect them too?


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Ok, upon further investigation, it "sounds" like they are connected and are trying to "operate", which tells me 2 things:

1. They ARE getting power...

2. The car is not sensing them

So they really could be malfunctioning?... or... They installed them backwards? I'm at a loss...

I took a video, you can hear them in action, but my MIL is still on...

Any thoughts?

How do I upload a video?

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An easy way to check if they are getting power is to unplug them at the black plug (you can easily see it in your pic in post #17). Even with the ignition off, when you plug each actuator back in, you should hear a beep or some sort of audible tone from each one. If no tone heard, they are not getting power or otherwise functioning.
If you DO hear a tone upon plugging them back in, then I would guess there could be any of 3 issues. I put them in order of probablility
1. Both actuators use a sort of wire "spring" (for lack of a better term) that goes through a rotating motion (see pic at bottom of this post of my actuator w/spring). These have broken in some instances. If either have broken, it will be obvious, although you will have to unbolt the actuator. Not a big deal - just the 3 bolts you see, and the spacers, too. Now that you have the actuators unbolted and have confirmed the integrity of the springs, you can proceed to #2.
2. The actuators were not properly installed to the brackets. It is one of those things that seems simple enough, but even watching the video (
), it is NOT. My advice would be to use the video as a guide, but not to overthink it. It will be clearer once you have them off ands see how the spring should be situated into the simulator bracket so that it will be able to go through the proper range of motion, thereby "fooling" the PCM and not throwing a code.
3. The actuators do have a proper LEFT and RIGHT, so they could be mixed up. Doubtful, but possible.
It would be easier if you have a scanner or use the Check Diagnostics page on your UConnect screen to make sure the actuators are the only thing turning on the MIL, then you can clear it before going thru the diagnostic process, and maybe after, too.
Hope this helps and LMK if you have any other Q's.:)
View attachment 202593
Ok so finally able to get under and check...

I unplugged and plugged back in:

Driver side: no noise when plugging back in, very loose on the bracket

Passenger side makes audible noise when plugging back in, like it's powering up, very tight in bracket


Any ideas why I wouldn't be getting power?

Maybe just bite the bullet and buy a new actautor?

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Ok so finally able to get under and check...

I unplugged and plugged back in:

Driver side: no noise when plugging back in, very loose on the bracket

Passenger side makes audible noise when plugging back in, like it's powering up, very tight in bracket


Any ideas why I wouldn't be getting power?

Maybe just bite the bullet and buy a new actautor?

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Little more digging, the driver side actuator IS getting power, but only after a few "convincing taps"... the connection seems clean and tight, and the passenger side is also getting power... however I'm still getting codes for both
P1217 and P121B...


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So are they connected? Ensure the actuators are installed on correct side (left and right)

You may have to remove and reinstall per video to make sure they are correctly on there.

What are the cut wires from?
I went under the car and it looks like they might be wires for the lights the previous owner had. I found LED light strips under the car on the driver and passenger side, but haven't been able to get them to turn on, my guess is those wires.

I will have to wait until next weekend to get under it to remove and re-install both actuators.

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If bot are getting power (hence audible tone upon reconnecting), then I would bet that either one of the "springs" is broken or more likely, incorrectly aligned/installed into the eliminator bracket. If it was not installed correctly, the actuator will not be able sweep through its normal range and will still throw a code.

Watch the video I posted above, and make sure you use the spacers in the brackets.
At least it looks like you won't need to purchase the actuators!:)
Thanks Chimazo! you're right at least I won't have to buy new actuators. I will keep you posted on the results.

I know I will have to go out and get another bolt for the driver side... looks like it fell out at some point.

I will also check the orientation, I'm guessing that is what's tripping me up .


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Ok, so I finally found some time today to get under the car.

Driver side was missing a bolt, so I removed the actuator from the bracket and used one of the bolts to find another from my local hardware.

Stainless steel #10-32 x 3/4" socket head. Picked up a pack of 2. Also grabbed some stainless steel washers, same size.

My spring is short, and compact.

I got under there to put it on the bracket, had a tough time because the spring kept trying to pop out through the back side, not much, just the "tip" of the spring kept popping through.

Once I had it "set", I tightened the bolts down, and turned the ignition to "RUN".

I'm still getting the p1217 and p121b codes but now I'm also getting the U113F code, which is failure to communicate with driver actuator.

Does anybody know the correct orientation for the spring when attaching to the brackets? Any pictures?

I ran through multiple cycles and tried putting the spring in at different positions... but the codes kept popping up. They are still running through their "checks", and the function sounds normal, both springs are in tact.

Any new ideas? Am I stuck having to buy new actuators?

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Flowmaster's headquarters are literally in my backyard they did a intake yes a flowmaster intake and a American thunder exhaust. Only issue now is those dang valves squeak to high heavin if it's in any mode other than track. It's embarrassing when I first start it. Working with my service department and flowmaster to resolve the issue any one else get the squeekes? Lol
Im not getting the squeaking. Just getting the MIL when I start.

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Have you tried clearing the codes and then seeing what happens? Normally codes won't clear themselves, at least initially, even if the problem has been resolved. I forgot to plug in the sensor when changing my air cleaner on my Scat Pack and even after I did, the code would still pop up. Easy enough to clear with a scanner.
Which scanner should I get? I want to make sure I get the right one.

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