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Old 10-26-2011, 09:36 AM
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Resonator delete on 392

Are most guys on here with the resonators deleted using the blastin bobs resonator delete kit? Is there any cutting involved in using that kit? How are the real life sound differences between stock and the resonators deleted realistically?


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Old 10-26-2011, 10:00 AM
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The Blastin' Bob's kit requires cutting the exhaust pipe using a tool that's like a plumping cutting tool for copper pipe, only much larger. I got mine at NAPA for around $40. Harbor Freight has one also and is what most people get since it's cheaper.
The Blastin' Bob's kit is flared so that it fits over the stock pipe at the cut and clamps in place. I then swapped my tips after breaking the spot weld - easy.
If you change your mind later, you can also buy sleeve clamps (Accuclamp makes one) to reinstall your resonators. I also got a variation of these at NAPA ($26 for the pair) but have not yet used them.
I got the BB glass pack kit for my R/T. I love the sound of the exhaust - especially with the windows down BUT there is a significant amount of "drone" (in quotes because a lot of people disagree on what that really is) especially in the 1900-2100 RPM range which makes conversation and listening to the radio a bit challenging.
If given the choice again, I would not make the change on my R/T. The 392 sounds even better stock, so I would certainly not make the change if that's the car I have (and when I get one! :-)
Everybody's different of course so there are going to be lots of opinions on this. At least you can change it back without a lot of expense or welding.
One more note - the BB kit pushed the exhaust tips out to the rear about 3/4 of an inch on my car. They were about flush with the facia panel before. Not a big deal but worth noting.
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Old 10-26-2011, 10:38 AM
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On my 2011 392, I took off the "mufflers" by the rear bumper and installed straight pipes in their place. I left the "resonators" in place that are located just before the rear axle. My dealer told me any alternations from in front of the rear axle forward will result in a voiding of the emissions portion of the vehicle warranty.
I think my car sounds great! It cost me $100 to have this done at the local muffler shop.
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Old 10-26-2011, 10:41 AM
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Originally Posted by kevnstac View Post
On my 2011 392, I took off the "mufflers" by the rear bumper and installed straight pipes in their place. I left the "resonators" in place that are located just before the rear axle. My dealer told me any alternations from in front of the rear axle forward will result in a voiding of the emissions portion of the vehicle warranty.
I think my car sounds great! It cost me $100 to have this done at the local muffler shop.

I think the resonator's are at the "rear" of the car just before the rear tips, and muffler's are in the mid-section.

I was going to actually delete mine till I found out about those stupid exhaust butterfly's on the 2012's, those would explain how quiet it is at idle, but when going WOT it simply screams. Since I am not crazy about the idea of a spring loaded butterfly exhaust system ( think how well it will work in a year or two of rust ect ) and see what it sounds like at idle without them.
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Old 10-26-2011, 11:22 AM
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Originally Posted by STRONGNUFF View Post
I think the resonator's are at the "rear" of the car just before the rear tips, and muffler's are in the mid-section.

I was going to actually delete mine till I found out about those stupid exhaust butterfly's on the 2012's, those would explain how quiet it is at idle, but when going WOT it simply screams. Since I am not crazy about the idea of a spring loaded butterfly exhaust system ( think how well it will work in a year or two of rust ect ) and see what it sounds like at idle without them.
I was just going by what my dealer called each item. I went there prior to doing any work to my car because of previous mistakes I've made that threw warranty out the door on other vehicles. The service manager called the small cans before the rear "resonators" and the mufflers at the rear bumper. Who knows??? I would have assumed the dealer knew, but heck he could be as educated as my 10 year old for all I know.
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Old 10-26-2011, 11:39 AM
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Originally Posted by kevnstac View Post
I was just going by what my dealer called each item. I went there prior to doing any work to my car because of previous mistakes I've made that threw warranty out the door on other vehicles. The service manager called the small cans before the rear "resonators" and the mufflers at the rear bumper. Who knows??? I would have assumed the dealer knew, but heck he could be as educated as my 10 year old for all I know.
sounds like your 10 year old is smarter lol how loud would you consider it on a scale of 1-10 (ten being loudest) and stock was a 4?
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Old 10-26-2011, 12:27 PM
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Are there really butterfly valves on the exhaust? Can you pull a fuse to constantly keep them open like many guys do on the zo6s?


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Old 10-26-2011, 12:58 PM
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Originally Posted by USMCAv8R View Post
sounds like your 10 year old is smarter lol how loud would you consider it on a scale of 1-10 (ten being loudest) and stock was a 4?
I'd say if stock level was 4, then with the "resonator" delete I'd say it's closer to a 7 now. I asked the wife, she says 8. Maybe I should ask my 10 year old...LOL
I get so many compliments on the sound of the car and IMO, it's how the car should sound from the factory. Not too loud, but you can hear it easily from behind in another car.
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Old 10-26-2011, 01:00 PM
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Originally Posted by gkviper192 View Post
Are there really butterfly valves on the exhaust? Can you pull a fuse to constantly keep them open like many guys do on the zo6s?


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Nope, they have springs to keep the tension to keep them closed, and as exhaust pressure increase's it "pushes" the butterfly's open. I can understand the theory, but IMO, I think its a poor design as it will only cause problems down the road. Can you imagine if one banks butterfly stay's shut... Anyway, just my .02, spend it wisely.
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Old 10-26-2011, 01:49 PM
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Originally Posted by STRONGNUFF View Post
Nope, they have springs to keep the tension to keep them closed, and as exhaust pressure increase's it "pushes" the butterfly's open. I can understand the theory, but IMO, I think its a poor design as it will only cause problems down the road. Can you imagine if one banks butterfly stay's shut... Anyway, just my .02, spend it wisely.
where are these springs located? after or before the cats? after muffler before resonators?
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