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Old 05-11-2011, 09:33 PM   #1
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Cat back Question

Anyone have experience with both the gibson dual cat back and the MBRP cat back.
I tried the gibson for 1 day and had to remove it due to the horrible drone that travels right through you at cruising speed on highway. as jeep is used as the daily driver 1 hour commute each way, pounding head, but did like the performance. Thinking of trying the MBRP anyone driven at cruise speeds with both to compare. Thanks.

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Old 05-11-2011, 11:22 PM   #2
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I have the gibson dual and at first I could not stand the drone at cruise speed.
I took it off and put it back on seating it really tight where it pairs with the engine pipe.
I then put dynomat under the carpet in the trunk and after about 500 miles later drone is gone and sounds really good.
Stay with it for a while and see if gets better

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Old 05-12-2011, 02:26 AM   #3
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I bought the Borla dual stainless cat-back system. From the day it was installed until about 500 miles later, it didn't sound any different, but after that time the sound changed for the better - however, I never had a problem with it like you're describing.
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Old 05-12-2011, 04:38 AM   #4
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You better keep it if you got performance out of it. You would be the first. Most new exhausts make it sound better and even make it sound like it is running better but none so far has actually produced anything notable from a new exhaust system. If you did you better never take it off
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Old 05-12-2011, 05:10 AM   #5
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Under drivers seat cut-off exhaust is best exhaust.
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Old 05-12-2011, 08:18 AM   #6
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Unless you have suicidal tendencies-never put your exhaust UNDER the cab--allways out back or side-

I've had pleasing sound/rap/burble, from my cat-back Flowmaster 40, mounting just forward of the EVAP can and exit-rear bumper--NO DRONE and a little on the loud side-nearing v8, but notquite there !!

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Old 05-13-2011, 09:56 PM   #7
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I have been considering the borla. Do you like them or would you have rather gone with a different brand? Back to the original question though...I saw a post on here not too long ago from a guy saying that the flowmaster 40s sounded really good on his. Nice deep sound and not to loud. Thats what he said at least. No experience myself.
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Old 05-13-2011, 10:49 PM   #8
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Quote:
Originally Posted by Thracks
Under drivers seat cut-off exhaust is best exhaust.
Isn't that sort of, uhh, deadly? Like in an I get sleepy carbon monoxide sort of way?
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Old 05-13-2011, 10:57 PM   #9
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I putting a MBRP rockcrawler catback system on my rig in a couple of weeks. Hoping to get a little more performance out of it. I am pairing it up with my snorkel for cold air induction, and my superchips flashpaq to tune the engine.

One of the reasons I choose the MBRP system is that the exhaust comes out the rear, not under the rig

All part of my build plan. Hope it works out

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