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cat back muff too noisy

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Old Aug 26, 2005 | 06:13 PM
  #21  
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Might as well just put a stock muffler on there. When I had a hooker catback behind my flp's and no cats it sounded stock.
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Old Aug 27, 2005 | 12:10 AM
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How do you fit a muffler in the I-pipe, won't it hit the driveshaft? I have a Hooker catback and while it fits fine I can't see how I could cram a muffler in there.
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Old Aug 27, 2005 | 02:24 AM
  #23  
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Originally Posted by BJM
How do you fit a muffler in the I-pipe, won't it hit the driveshaft? I have a Hooker catback and while it fits fine I can't see how I could cram a muffler in there.
It's a round muffler, it fits fine. The only thing I had to do was hammer the right rear seat shell upwards -- just a little, it's a soft metal so it's really easy. See pic. It doesn't touch the drive-shaft at all, and there's enough space there to remove the shaft if you need to.
Attached Thumbnails cat back muff too noisy-xr-1.jpg  
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Old Aug 27, 2005 | 04:05 PM
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I will have to take a look under my car again and check for space. It sounds like the Borla is a good muffler, I checked Summit and they want close to $200 just for the muffler, does that sound right
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Old Aug 27, 2005 | 04:37 PM
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Originally Posted by BJM
I will have to take a look under my car again and check for space. It sounds like the Borla is a good muffler, I checked Summit and they want close to $200 just for the muffler, does that sound right
No, not if you're putting one in the I pipe. The 3" in/out 5" round is # 40085. I have one on my loudmouth. I paid about 135 for it several years ago, I believe they are cheaper now. It can be made to fit, I notched my pipe to get the angle right and took it to a welding shop to zip it back up.
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Old Aug 27, 2005 | 04:39 PM
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Anyway, have you looked at the Dynomax Ultra Flo mufflers? I don't know if they make one for our cars specifically, but I've had one before and it was pretty darn quiet, & rated at a high flow.
http://www.dynomax.com/ultrafloss.stm

Last edited by gwj; Aug 27, 2005 at 04:50 PM.
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Old Aug 27, 2005 | 04:47 PM
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I'd put a stock muffler in there if you think Hooker with cat's is loud. I'm currently running LT's, ORY, and then a dump absolutly nothing to restrict the flow or quite the exhaust.
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Old Aug 27, 2005 | 09:16 PM
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The SLP dual/dual flows well, sounds good, and is not too loud.
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Old Aug 27, 2005 | 10:23 PM
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SLP Dual Dual. Bullet in the I-pipe that will take care of it. Of course you are probably going to loose a few horse's
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Old Aug 28, 2005 | 10:25 AM
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Could he have a shop make a custon true dual set-up with an x-pipe and run like 4 cats, similar to some of the stock mustang set-ups and then put dual borla bullet mufflers? Im sure that would quiet everything down with the additional cats and the true dual system, even with the 4 cats, shouldnt cause him to lose too much power. Just a suggestion, could be completely wrong. Anyone who knows feel free to chime in.
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Old Aug 28, 2005 | 10:26 AM
  #31  
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Originally Posted by 98Z28MASS
Could he have a shop make a custon true dual set-up with an x-pipe and run like 4 cats, similar to some of the stock mustang set-ups and then put dual borla bullet mufflers? Im sure that would quiet everything down with the additional cats and the true dual system, even with the 4 cats, shouldnt cause him to lose too much power. Just a suggestion, could be completely wrong. Anyone who knows feel free to chime in.
that setup would probably sound rediculously bad-***, but I think it would still be too loud for his purposes!
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Old Aug 28, 2005 | 10:31 AM
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Take it too a muffler shop and have them put on 2 resinators...somewhere on the Y-Pipe on both sides. I had a flowmaster with the same problem...loud as crap, especially at certain RPM's...like driving on the friken highway, it just screamed!! It was cool at first but then got annoying as hell. I put a resinator on it off a Ford Diesel truck...it quieted that thing that very well. When you got on it, it still sounded very aggresive...but when you're just cruising along, no rasping or droning...fixed my problem. And, they're strait through pipes so they don't restrict the flow. Either than, or get some resinating exhaust pipe tips...they sell them at Auto Zone for 12 bucks.
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