AZDustMuncher
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I got a question for the people who have done the cat back exhausts. What is inside the stock resonator? Is there anything in it that would restrict exhaust flow?
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Did you see what is inside the stock resonator. I was curious if it's the same as a straight thru muffler.I replaced the stock resonator with a magnaflow 10416 and replaced the stock muffler with a magnaflow 12256 kept the stock tubing. Sounds great!!
That's what I wanted to know. I don't see any reason for at cat back over axle back from a performance stand point then.I removed the stocker resonator and did a bit of a custom exhaust build from that point all the way back on my Rubi.
To answer your question, the stock resonator is essentially a “straight through” type with a perforated pipe passing through (same size as exhaust piping) with likely a fiberglass insulator wrapped around between that perforated core and the outer shell/casing.
I tried many variations with the exhaust as I cut, hacked, welded, deleted, replaced, etc.
This 3.6 actually sounds great with nothing but the stock resonator. With no muffler it’s a bit raspy for my taste. And I had some awful drone at 2400-2600rpm until I finished my build (see below). I tried a 2’ long cherry bomb glass pack in its place and it cleaned up the rasp a TINY bit. Ultimately what I have now is a “Magnaflow” Rumble 2-chamber (flowmaster clone) where the stock resonator was, the cherry bomb right behind it, and a bit of work in the rear over the axle to shorten the drop and keep a 3” tailpipe tucked high for good clearance, to a turn-down right at the bumper. I really love the sound of it all. I have no interior drone, it’s nice and quiet cruising but you can hear it when you really get on it. And outside of the vehicle it’s definitely a slightly louder, very mean, but clean sound.
Some manufacturers will include weep holes to drain condensation that collects at a low point in the exhaust system.Piggybacking on this thread. A bit humid and cold out this morning and noticed exhaust coming from below my JLUR this morning. Got closer, and noticed a pinhole in the resonator with exhaust coming out. Is this normal? Sorry, first time Jeep owner, and this isn't something I've seen on any of my previous cars (Civic Si's and VW R32), possibly because I can't see the exhaust that easily.
Edit/update:
Found some photos elsewhere online, and the pinhole seems normal (see attached photo of mine).
Most stock mufflers and resonator’s have tubing and other devices to direct the flow or create turbulence in the flow of exhaust gas to create sound canceling and restriction. Your resonator rids the drone tones that an aftermarket system may not do. So yes the stock exhaust system is restrictive. Aftermarket systems are less restrictive and usually have fiberglass or some other non-combustible material packed in them to help with sound and drone but in time blow out making the exhaust a little louder.Thanks @Magnaflow. Very weird to see exhaust spewing from it one morning.
How do you think the stock resonator would sound placed in front of a Flowmaster Outlaw Extreme?I removed the stocker resonator and did a bit of a custom exhaust build from that point all the way back on my Rubi.
To answer your question, the stock resonator is essentially a “straight through” type with a perforated pipe passing through (same size as exhaust piping) with likely a fiberglass insulator wrapped around between that perforated core and the outer shell/casing.
I tried many variations with the exhaust as I cut, hacked, welded, deleted, replaced, etc.
This 3.6 actually sounds great with nothing but the stock resonator. With no muffler it’s a bit raspy for my taste. And I had some awful drone at 2400-2600rpm until I finished my build (see below). I tried a 2’ long cherry bomb glass pack in its place and it cleaned up the rasp a TINY bit. Ultimately what I have now is a “Magnaflow” Rumble 2-chamber (flowmaster clone) where the stock resonator was, the cherry bomb right behind it, and a bit of work in the rear over the axle to shorten the drop and keep a 3” tailpipe tucked high for good clearance, to a turn-down right at the bumper. I really love the sound of it all. I have no interior drone, it’s nice and quiet cruising but you can hear it when you really get on it. And outside of the vehicle it’s definitely a slightly louder, very mean, but clean sound.