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Vibrant Resonators--highly recommended!

21K views 23 replies 12 participants last post by  Frontline  
#1 ·
I just changed my exhaust AGAIN. Since I made catless testpipes early this year I have been rewarded with a little too much volume, rasp, & rattling. These test pipes were "fake cats" with a straight through pipe inserted inside.
So I just got a pair of Vibrant resonators. These are little bitty 3.5" x 10"(body) bullet resonators made of polished stainless steel. I think they are 12" overall. Mine have a 2.25" in/outlet. Cost me $47 each. Anyway got them put in today. Put them where my primary (and fake) cats were.
I was pleasantly surprised they did an excellent job. They cut sound levels maybe 15-20%, took a little rasp out, and took the rattly noise I had after I made the "fake cats" earlier this year. I'm very pleased. My truck is still pretty loud, but I can hear my intake much easier, which I love. And I don't have to worry about "unwanted" attention now. I'm pretty sure this is my final exhaust setup now. Really.
Here is couple images. Please ignore all the welds-I've had to rework those testpipes about 3 times in the past to finally finish with this setup now.
Just thought I would pass this on for anybody who needs to take just a little off the tone or volume of their exhaust. I highly recommend these :thumbup:

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Discussion starter · #3 ·
Discussion starter · #4 ·
Oh the other thing I forgot to mention is these are a straight thru design and no louvers or restrictions of any type. Basically these tone the exhaust down just like when I still had my primary cats, but without their restriction.
 
Discussion starter · #8 ·
Love it! With my set up (refer to signature) I get a lot of that raspy tingy sound and it drives me absolutely nuts! I'm thinking of pulling the flowmaster 40 out and throwing it straight in the garbage! Haven't decided what muffler to go with next (any recommendations?). But maybe I'll throw a couple of these in the line up as well!
The flowmaster 40 is one of their free-flowing mufflers, so I can see you get some extra noise from it. A flowmaster 50 series SUV generally gives a nice deep sound (for a DOHC V6) and not any rasp.
So I would suggest that flowmaster, or just get one of these resonators for your tailpipe. Vibrant even make a "ultra quit" resonator too. It's about 12" x 4.5" x 6.5" & is suppose to very good. A lot of Z guys get them(and the one I got) to take rasp out when they get a serious exhaust. I didn't have room for the big ones, but these little ones still did the trick.
 
Discussion starter · #9 ·
It's a fine line getting to sound good vs rice. That sounds more like a 350Z, I like it.
Yeah it is hard getting that sound right. Now I have a decently deep idle and when putting around revving a little going through the gears, it sounds pretty sweet. With the exhaust note along with my intake, I spend 90% of the time with my windows down and the radio off just so I can hear the sweet sounds.
Only issue I have sound wise, which you can hear a little in that clip, is valvetrain noise. Those Brian Crower cams gave me some power and a little cam lope which I like(again you can hear some in that clip), but it also increases the valvetrain noise. I checked my bucket clearances very carefully so I know they are good. I guess the extra lobe lift just added some noise. In fact the cam noise I think actually contributed to my exhaust noise too when I went catless. That was the "rattlely" noise I mentioned. The resonators have totally eliminated that.
 
Discussion starter · #11 ·
No, I mean that's a pretty easy place to put it--in your tailpipe, not instead of your tailpipe. Might not work as good that far back, but it should help.
 
Discussion starter · #18 ·
I got them from Amazon. You had your cats off when you got tuned correct? I figured the Uprev tune would have fixed your lowend loss. I know it did mine. It took me a year of driving around without rear cats before I finally got my tune. After Uprev got their hands on it, my lowend was fine. You know it took about 1 yr after we all visited Uprev to get tuned. Really sucked waiting that long to get the 08+ ECU's ready to be tuned.
But even now, catless, all 2.25" duals with no restrictions, louvers, baffles, etc.--all straight through--I have great throttle response and good lowend power.
These resonators have no restriction, so they won't help on lowend power loss after removing primary cats, only a good retune will do that. But they will help keep the sound moderate after their removal.
 
Discussion starter · #20 · (Edited)
So are these billed as faux cats? I'm confused becasue you said you built your own faux cats, but these are straight through also, so I don't know how you've gained a reduction in noise.
I had fake cats before I installed these resonators. Those fake cats were custom made by myself. But the were a bit rattly and my truck was louder than I prefer, thus the reason for going with my resonators instead. And even though these are straight through design, they still have perforated tubing surrounded with sound deadening material.
 
Discussion starter · #22 · (Edited)
I see. Sounds more or less like a glasspack.
Pretty much. I had a good chance to drive it a lot this weekend and I am still very pleased. My tone is pretty deep now with very little rasp. I think their position so close to the headers make them even more effective.
Here is what they look like inside---
 

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