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Dual Exchaust for 5.3 Yukon

Zentos

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Zentos Enthusiast

Zentos

Posted
Posted

I've read many posts about exchaust systems people have gotten and the ranges of prices spent. I want to put dual exchause on my Yukon. It has the 5.3L engine. In the past I've always seen people put on true dual exhaust systems (dual-in / dual-out). With the vortec engine is this the best way to go?

 

I'm looking for more power in the lower end. As for noise, I want people to hear it when I stomp on it, but when idling and cruising down the highway I'd prefer to have more of a 'sleeper' sound to it.

 

Also, what is the max pipe size to go with on the Vortec engines? I've heard everything from 2.25"-3.00".

 

I'm looking at Flowmaster setups right now, as a friend of mine told me it would give me the noise levels I wanted and the power as well.

 

Thanks in Advance!

GlennRMK Enthusiast

GlennRMK

Posted
Posted

Right now I have a 40 series, 3" in/2.5" out.

 

Runs great. Lost no low end, maybe picked up a little. Nice increase in top end.

 

Everyone was telling me to go 2.25". But I say go with 2.5".

 

My only complaint is it is still way too quiet. But there really isn't much that is louder then a 40 series.

 

I was thinkin about straight pipe, but not sure.

LikeaRock14 Enthusiast

LikeaRock14

Posted
Posted

Well even though I know some people haven't noticed a loss of low end w/ 2.5" pipe, I still like to reccomend 2.25", it seems to be the most efficient, and it has more than enough capability to flow the cfm's the 5.3 makes. I guess it depends on the engine slightly. One engine could come off the assembly line w/ a slightly more aggressive cam, another will be milder (don't know if it's possible, but specs could be off a tad just to help that much).

You're able to retain enough low end and still have significant gains at the top of the rpm range.

As for dual in, it's not needed for the 5.3 motors. They y into a single 2.75" or 3" in, so a single/dual is all you'll need. There's a lot more choices when it comes to single/dual too, rather than a dual/dual setup.

 

As for the type of muffler to achieve the sound you're looking for, the three mufflers for a good price would be Spin Tech, Magnaflow, and of course Flows, heh.

I personally would reccomend the Spin Tech over most, since they have a deeper idle than Flows in some applications, they have a lower interior noise level, and sound freaking awesome outside. My neighbor had the Spin Tech Truck/RV muffler installed on her XL, and it had great results. On acceleration, it has a nice low tone, and inside it's almost like stock. It roars pretty d**n well under harder acceleration I'm planning on swapping to this muffler hopefully this summer.

I currently have the 70 series on my 2000 7.4 ltr, and I couldn't be happier, just wish it was a little bit louder and deeper. There's no drone at all, except a hardly noticeable bit around 30 mph cruise, but it's actually very pleasing to hear, it just lets you know the exhaust is there. A 50 series will of course be louder, but should have only a slightly louder tone inside than the 70 series.

Magnaflow also makes one hell of a product, excellent quality and great performance increases. I've got the 14" on my 96 Ram, and there's not one bit of sound inside at all at any crusing speed, which is rare for even the 14", there normally is some on most vehicles.

For you though, at least if you choose Magnaflow, I'd reccomend running the 24" case. It has the same tone as all the shorter case Magna's, but the lowest level of interior sound over all Magnaflows. I love the sound, I just don't have a 5.3 to put one on, at least yet...

 

My personal favorite would have to be the Spin Tech, better performance increases than Flows, although a simimal sound and lower interior sound levels. The only other companies I'd reccomend for the type of sound you're looking for would be Corsa or BB TriFlo, but unless you're going to spend an easy $675 or more, I'd stick w/ the smaller, yet still quality brands :sigh:

Mouse2 Enthusiast

Mouse2

Posted
Posted

2-1/4 tailpipes are plenty large for your truck, and I would recommend the single in dual out muffler. I run true duals on my 99 and it tends to fluff when my 5.7 warms up and leans out the fuel injection. I think the single in dual out will take any pulsation out of the exhaust. Also remember that unlike the truck guys, your muffler sits right under the back seat and the tailpipes also exit under "passenger space" so you will hear the exhaust more than they do. Check out the sound clips on magnaflows website, I like there 5.3 setup.

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