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Discussion Starter · #1 ·
I got a 1999 GMC Suburban with 2 inch body lift,I want to get new exhaust installed on it. I had Flowmaster's put on my yukon I had few years ago and enjoyed those not sure if should go with same thing or something different. I want LOUD but really deep sound.Also want to know what else I can do to improve gas mileage I am thinking of cold air intake and maybe throttle body spacer? Not sure...suggestions are helpful.

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Anyone got any info or experience with the Gibson Metal Mulisha Exhaust? Those are the ones I really like the sound of...
 

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Throttle body spacers are pointless and a waste of money. The only way that you are going to see major differences from CIA and exhaust is with a custom tune. As far as exhaust goes, it is personal preference. I would ask some guys with trucks that I like the sound of what they have. I like the sound of flow master, but I hate the drone on the highway.
 

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If you liked the Flowmasters you had on your Yukon, then stick with that.
 

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Discussion Starter · #4 ·
Yeah thinking of going with flowmaster 10's. The guy that did my last vehicle exhaust said the 10's are nice but people keep bringing them back because they resonate throughout the vehicle...wish I could drive in a vehicle with that resonation before I got it done on mine. So no on the throttle spacers....anything else you would suggest doing to it? Gonna get new tires plus the exhaust and cold air intake...would love more power and gas mileage so..
 

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if you lower the vehicle and have stock sized tires you will inrease the MPG. the taller the vehicle the greater the friction and lower MPG.

The throttle body spacer with a stock engine is a waste of time and money. a cold air intake air filter may be good with very hot temps 90 deg F plus but at lower temps the engine will run poorly the colder the air temp.

if you wish to make a lot of exhaust noise there are may options. I would get a low restriction stainless steel exhaust . the custom exhaust shop will help with what sound your looking for,
 

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on my 04 silverado i started by replacing the stock muffler with a generic magnaflow muffler off the shelf. i wasn't sure how it sounded untill i had a friend do a drive by and it was awesome, but i wanted more noise in the cab so i got a cat back dual flowmaster super 44. loved it to but cab drone was more an occasional issue. i found it was certain highway speeds. mostly if you were speeding a bit. i found by asking people and even youtubing diff exhaust systems on my truck it helped make my decision.
 

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I like the sound of my corsa sport exhaust... in combination with my headers. I get compliments from the local shops... there is nothing in my area that sounds like it...:)))
 

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Discussion Starter · #8 ·
Fell in love with the Dynomax Bullet exhaust but dynomax says they don't have that system for a suburban so gonna have to go with Flowmaster 10 series...I got 3 kids and a wife that drives the vehicle every day should I stick with 1 exhaust or true duals? the exhaust guy said a lot of people bring their vehicles back because of the drone inside the vehicle from the true duals.
 

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Are the 10 series the small single chambers? I have them on a 78 z28 and there crazy loud for family I had a set of the 1k HP race mufflers on a impala that were that style single chamber small square very loud aggressive tone
 

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i got Thrush and it Sounds Good Not as Deep as id like but its good for the price and its only a single not duel
 

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I put a Magna flow on mine the dual in and dual out. It used to be a dual 2" into a single 2 3/4" out of the tail pipe.
Now it is dual 2 1/4" in and dual 2 1/4" out. One outlet was extended over to the driver side tipped with chrome.
It looks real nice.

It is a deep sound, not loud but you can tell it's not stock.

To increase MPG get a good tune up, check the tire pressure.
I agree with J Cat, Go to a tire that has less foot print (road contact) for less rolling resistance.
Coast to red lights; easy off on green lights - unless it's needed. Basically be aware of hard throttling and take advantage of the inertia in the mass of the vehicle to carry you to the red light.

Mike Woj
 

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Hi guy's, new to the site... I have what I call an early model 1999 Burb K2500 4X4 8600gvw with the 7.4L 454. I'm in Illinois and I just passed my very last emmission test so I can pull off the cats..etc... because I no longer have to get the truck tested. With this said I to am looking around for an exhaust system that sounds a little "high pro" but not with a drone sound. I could go with what I call a ture duel system but what do I do with all of the sensors factory installed into the exhaust system?

My overall plans for my baby is to install a new fresh air intake, exhaust, get a tune done or install a programmer so I can change things on the fly... Level the front end, Install all new body mounts and bushings.

Any ideas guy's??

Great Site,

Wags
 

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I have a cold air intake and a magnaflow installed on my Yukon XL. I bought it that way. It had a nice deep tone on idle, but on the freeway, anything over 65mph resulted in a horrible drone.


Towing a trailer up an incline, the whole cabin would rattle. I went to a shop and they recommended the Magnaflow XL. It is an extra large muffler. The truck is much quieter. Wife is also much happier. :happy:

http://www.magnaflow.com/02product/universalsatinxl.asp

I have a 2500 6.0. And the shop guy said the 6.0 is harder to muffle than the 5.3. I don't know if that is true or not. But definitely it was louder than the 5.7 in my '98 Burb.
 

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Hi Wags,
I have a 97 Suburban with a 5.7.
I recently replaced the engine.
During the installation ceramic coated Flowtech headers were installed instead of the cast iron manifold.
The vehicle was running pretty poorly and I installed a test pipe in place of the catalytic converters.
This did not help and the stock muffler was replaced with a Magnaflow muffler w 2 inputs and 2 outputs. The second output was run over to the drivers side for a quasi dual setup.
The sound was better than stock, kind of deep but also kind of quiet.
The test pipe was removed and the dual catalytic pipe was put back in.
The sound of the Magnaflow became a little bit louder. I think it became louder because the air flow slowed down. I think they sound better.

I have had it all kinds of speeds and the increased sound has not been a problem at highway speeds or towing.
My wife likes them better than the Flowmasters on my 75 GMC PU.

Mike Woj.
 

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Thanks Mike, My Burb is a 99 K2500 7.4L I'm looking to run headers with a "true dual" set-up and am having a hard time finding anything for the 7.4L everything is either for the 5.7 or 6.0.. I'm thinking having the ECM reprogramed can at least take care of a couple of the sensors.
 

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I got a 1999 GMC Suburban with 2 inch body lift,I want to get new exhaust installed on it. I had Flowmaster's put on my yukon I had few years ago and enjoyed those not sure if should go with same thing or something different. I want LOUD but really deep sound.Also want to know what else I can do to improve gas mileage I am thinking of cold air intake and maybe throttle body spacer? Not sure...suggestions are helpful.

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Anyone got any info or experience with the Gibson Metal Mulisha Exhaust? Those are the ones I really like the sound of...
Gibson Metal Mulisha exhaust are top quality. It's what I'm going with when I get there. Whatever brand/s you must go from headers all the way back and then tune it. So it's best to maybe be doing the exhaust mod with something like a cam mod. I'm rebuilding my 5.3 next most likely instead of a crate swap and will do a cam job then, and days later will be installing full Gibson exhaust then the retune which is a must when modding for power.
Cold air intake is always good but for my year burb a simple drop in K&N dry air filter works well.

Good Luck!
 
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