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Old 04-30-2005, 11:04 PM   #1
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Default Dual Exhaust?

I was driving around with my friend one day, and he suggested i get dual exhaust on my olds eighty eight LS, now this seems like a good idea, but i was wondering about how much it would cost, and how it would sound and stuff.

i'm thinkin of going with 2 catbacks, but my friend thinks straghtpipes are the way to go, i dont want too much interior noise, but i want my car soundin good, so i dont know.

i plan on gettin this done in the future though, considering i'm broke as a joke right now.
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Old 04-30-2005, 11:07 PM   #2
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i would just do a Muffler with the dual outlet as apposed to yout single outlet that you have now.
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Old 04-30-2005, 11:08 PM   #3
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Straight pipes will be loud. I have 3" straight back to a magnaflow muffler. I have one of the loudest exhausts you will ever hear on a Bonneville. If you want to keep the sound under control go with a high flow cat, resenator, and a high flow muffler. I'd use 2.75" pipe unless you plan on heavy modding.

And as far as dual pipes, I wouldn't suggest true duals, but rather a split coming out of the muffler. True duals may take away a lot of your low end torque.
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Old 04-30-2005, 11:12 PM   #4
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Quote:
Originally Posted by SSEi95
Straight pipes will be loud. I have 3" straight back to a magnaflow muffler. I have one of the loudest exhausts you will ever hear on a Bonneville. If you want to keep the sound under control go with a high flow cat, resenator, and a high flow muffler. I'd use 2.75" pipe unless you plan on heavy modding.

And as far as dual pipes, I wouldn't suggest true duals, but rather a split coming out of the muffler. True duals may take away a lot of your low end torque.
hmm, so 2 duals will be bad and get rid of some torque, so about how much would it cost to get all this done???
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Old 04-30-2005, 11:18 PM   #5
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yea, I lost a little low end with my 3" single pipe, duals would loose even more.

And for cost, if you use existing piping in your system, you could do it for just a couple hundred. If you do a full cat back system, my guess would be anywhere from $500-$900 installed.
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Old 04-30-2005, 11:20 PM   #6
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Quote:
Originally Posted by SSEi95
yea, I lost a little low end with my 3" single pipe, duals would loose even more.

And for cost, if you use existing piping in your system, you could do it for just a couple hundred. If you do a full cat back system, my guess would be anywhere from $500-$900 installed.
sheesh,

i think i'll stick with the pipes already in my system, and have em do dual tips.....

so, will there be any real power gain from the new exhaust?
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Old 04-30-2005, 11:23 PM   #7
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this mod alnoe, probably not really. You would need to combine this with other mods like a CAI, 180 t-stat, maybe a chip, to get any real use out of it. Exhaust mods generally allow other mods to perform better and offer little noticable power on their own.
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Old 04-30-2005, 11:30 PM   #8
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Quote:
Originally Posted by SSEi95
this mod alnoe, probably not really. You would need to combine this with other mods like a CAI, 180 t-stat, maybe a chip, to get any real use out of it. Exhaust mods generally allow other mods to perform better and offer little noticable power on their own.
i asked my dad about the 180 degree T stat, basically it does not keep your engine any cooler, all it does is turn your fans on earlier, but your engine heats up just the same, you would need to get new fans for any real effect.


at least that'* what one guy my dad talked to at his job (car dealership) said.
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Old 04-30-2005, 11:31 PM   #9
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what is a cai by the way?
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Old 04-30-2005, 11:35 PM   #10
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CAI is a Cold Air Intake. This would be like the pipe and cone filter intake vs a stock airbox.

and the 180 will help your car run closer to 180 degrees vs 195 degrees like the factory one is set at. If you are sitting in traffic on a hot day, you'll still see the high engine temps. but if you are cruising down the road on a fair day, you'll see about 15^ colder engine temps.
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