Exhaust comparison - Mufflex, aFe, aFe w/ long tube headers, 392 Charger - Jeep Garage - Jeep Forum

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Old 05-01-2016, 10:22 PM
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Exhaust comparison - Mufflex, aFe, aFe w/ long tube headers, 392 Charger

So a couple months ago I posted praising the Mufflex kit. For the $300 I spent, it is certainly worth it. It increases volume by a lot and sounds fairly aggressive. It is not a super refined sound, but for the money, it is a win.

I bit the bullet and bought the aFe Machforce to decide if it would be any better (plus hopeful performance gains). It is fairly louder, and raspy. The "clicking" noise can be heard across a lot of videos I've seen, so it is definitely there. It's weird... don't know what I think about it. Doesn't sound bad, just strange. I'm thinking the long tube headers will overpower that sound though once installed. The aFe exhaust has a lot more of the "blaap"... kinda fart noise, during shifts, that can be heard in the 392 Charger video. For whatever reason, my Jeep decided not to do it much on this run (it did on the way back but you can't hear it). It is a lovely sound though! There is zero irritable drone with this setup... it just sounds great.

For comparison sake, here are the clips I have. First is Mufflex (no cold start though). Then is aFe cold start, and aFe acceleration w/ downshifting - hard to hear though because of COURSE people come down the road when I'm recording. Lastly I have a shot from the 392 Charger I had with active exhaust valves - I suspect if Jeep changes the exhaust in the new MY, it will be VERY similar!

Long tubes are being installed over tomorrow/Tuesday, with a video to hopefully follow Tuesday.






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Old 05-02-2016, 11:29 AM
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Re: Exhaust comparison - Mufflex, aFe, aFe w/ long tube headers, 392 Charger

I got my AFE kit put on my '14 this weekend too. Fit and finish is A+. The sound overall is good with the exception of a little bit of blaaaty fart noise during hard acceleration and shifting. I was a little disappointed in the volume. I was hoping it would be louder. But it does sound good. If I had to do it over again, I'd probably have saved the $845 and just had the center muffler cut out and replaced with an X pipe. But overall I'm happy enough with the AFE kit to leave it on there for now.
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Old 05-02-2016, 01:54 PM
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Re: Exhaust comparison - Mufflex, aFe, aFe w/ long tube headers, 392 Charger

Best bang for the buck is absolutely some variant of straight piping the factory system. But I love love love a good sounding exhaust, so I'm hoping the aFe full system will wow my socks off.

Different strokes for different folks! I love the fart/blaaap/belch of noise during shifts. It gives it character (and reminds me of the exhaust on the 392/HC). The aFe sounds really good during engine braking when it afterfires and pops/gurgles.
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Old 05-07-2016, 12:48 PM
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Re: Exhaust comparison - Mufflex, aFe, aFe w/ long tube headers, 392 Charger

Had a bit of a leak after I left the shop. Took it back to the shop and they initially thought it was the clamps between the cats and headers that was causing the noise. There was clearly a leak on the passenger side (black soot evident at the slots on the tubing). They said everything in the kit was great except for those clamps at that specific spot. Popped the clamps off and welded it up instead. Started her up, noise is still there... as I suspected, the passenger side header bolts were loose - but to their surprise, not as loose as they thought they would be. The tightened down both sides and it seems like the issue has subsided. I say seems like because I almost feel that I can still hear some of the noise and BARELY smell raw exhaust, but it's hard to say. If it gets bad again, I am taking it back and having locking bolts installed.

For the cold startup video below... the tone is accurate, but the recording lacks the bass that is present. You can hear vibrations if you listen closely... it's that powerful. Once I took those few steps closer, I literally felt the exhaust vibrating my pants. When I was sitting in the waiting room at the dealership today while they checked out a potential leak, I heard it inside the bay every time they started it up, haha. It is much more aggressive than a HC/392 startup decibel wise(if you've heard one), but the tone between the two exhausts is actually very close (on startup only). So again, I cannot reiterate how good the current exhaust system is on the 392's/HC's. Hopefully SRT brings it to the Jeep for the next models.

My fuel level has tanked the last 2 days. I get into the throttle a lot harder. The grin is unavoidable. Once you hit 2.5K RPM, the exhaust comes alive in a way I have NEVER heard from another vehicle in my neck of the woods. It is truly awesome. The difference these headers make combined with the catback is just flat out incredible. aFe's video, while short, is spot on with how awesome the exhaust sounds.





Quick revving and acceleration shot with downshifts and acceleration on the way back. You can hear me on the way back at about 1:25, roughly a 1/4 mile away (have to turn up the volume a bit).
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