true duals vs single in dual out muffler

[ivorton74]

so I really want to get dual exhaust for my truck. cant really afford true duals now so im thinkin I might just get a flowmaster super 44 or 40 series with single and dual out 2.5 inch. what do u guys think...does it make a difference which one I get?

[INSIDIOUS '86]

Why bother? Save up for some good exhaust IMHO. Couldn't recommend a single flowmaster ever
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[cory d]

i wouldnt go with flowmaster anything, they dont flow well and they make your truck soud like a boat, or chewy. you could always keep it a single and do a glass pack. that wil lessen back pressure and they are cheap

[motornut]

Originally Posted by ivorton74

so I really want to get dual exhaust for my truck. cant really afford true duals now so im thinkin I might just get a flowmaster super 44 or 40 series with single and dual out 2.5 inch. what do u guys think...does it make a difference which one I get?

what do you have now?
any mods?
got a cat?
what size in?
that far back doubt over scavenging would be a prob
I went 2.25 on a 305 with 40 flows in duals,love it!

[INSIDIOUS '86]

Dyno max also has a dual system for $132 on summit. Add mufflers and your done. Two flobastards cost about that much
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[ivorton74]

Originally Posted by motornut

what do you have now?
any mods?
got a cat?
what size in?
that far back doubt over scavenging would be a prob
I went 2.25 on a 305 with 40 flows in duals,love it!

@motornut...im running a single 2.5inch with a thrush turbo muffler exiting in front of the rear tire... no cat

[GM-power]

My muffler fell off awhile ago and I drove like that for awhile. Sounds good but it would kill my head on long drives. Being broke I just put a flow 40 and pipe out. Its sounds good, but I plan on duals in the future. Save up for true duals it'll be worth the wait. As for muffler get what you like, I like flow 40s they have a nice throaty tone.
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[Redcap]

"This single exhaust sounds so much better than duals"

...said no one ever.

[motornut]

Originally Posted by ivorton74

@motornut...im running a single 2.5inch with a thrush turbo muffler exiting in front of the rear tire... no cat

Short pipes n a sweet muffler
No cat
Your gona like it
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[cory d]

Originally Posted by Redcap

"This single exhaust sounds so much better than duals"

...said no one ever.

L6 owners may argue with that but on a v8, duals are good

[kalbert]

Originally Posted by cory d

L6 owners may argue with that but on a v8, duals are good

L6 with the split manifold sounds sweet with dual pipes, so there may not even be any L6 guys who prefer the sound of a single pipe!

[Pyrotechnic]

If this is a temporary solution I would just replace your turbo muffler with a Flowmaster and leave it at that. That will at least keep you happy in the sound department and will cost the least money until you upgrade the entire system.

[Corts60]

If I had to choose between "true duals" with no H or X pipe and single exhaust with a good flowing muffler, I would choose the latter. At least then you will still get good scavenging, and if price is an issue for you right now I think that is your best option.
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[Billett]

save up for true duals. It's worth it. Sounds 10x better than a split muffler. Go with whatever you like the sound of, but I love my flowmasters.

[Firebirdjones]

Sounds are subjective and it really comes down to personal taste.

As far as performance goes, on mild engines the single inlet/dual outlet design gets the job done. Was factory equipment on 3rd and 4th gen Fbodies, and most of your aftermarket systems are also done this way, which easily support many 10 and 11 second Fbodies. Generally the intermediate (single) pipe should be at least 3" with a very good "Y" pipe and merge collector, from there a muffler of your choice and 2 1/2" dual tailpipes will work. I've seen this setup support over 500 RWHP on the dyno regardless of muffler used. Of course a dual system may pickup some power, or in my case I increased the size of the "I" pipe to 4".

Alot of these single systems sound very nice. My wifes 4th gen Fbody uses a 4" intermediate pipe and magnaflow muffler. As far as sound, you hear it coming, no one can honestly tell the difference if it's a dual or single system. Frankly it's a bit too loud for my taste.

For a mild 350 in a pickup truck, I'd just use what suits you best with minimal cash outlay.

[79Betty]

True duels 2" straight out the back. I love it. Even o my 4 banger ranger id never run single pipe.
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[Billett]

^Are you trolling right now? Dual exhaust on a 4 banger?

[ivorton74]

Originally Posted by Billett

save up for true duals. It's worth it. Sounds 10x better than a split muffler. Go with whatever you like the sound of, but I love my flowmasters.

@billet...is that ur truck in the pic there? I heard how that truck sounds on youtube with the super 44s...that's what made me want to go with 44s. I love the sound.

[cory d]

Originally Posted by Billett

^Are you trolling right now? Dual exhaust on a 4 banger?

i dont knwo how rangers are but my dad has/had 5 billion toyotas with 22r abd 22re's and the exhaust manifold has 2 exits. then you have two pipes that join together under the cab

[79Betty]

It had a split home made header. I loved it. Just givin my 2c.... I would save up for true duels and get some headers...
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[Billett]

Originally Posted by ivorton74

@billet...is that ur truck in the pic there? I heard how that truck sounds on youtube with the super 44s...that's what made me want to go with 44s. I love the sound.

yeah that's mine. I love the raspy sound the flowmasters have, but its all personal preference.

Originally Posted by cory d

i dont knwo how rangers are but my dad has/had 5 billion toyotas with 22r abd 22re's and the exhaust manifold has 2 exits. then you have two pipes that join together under the cab

It isn't a matter of being possible. It's the fact that it would rob a ton of performance from an already gutless engine. I have no idea whether it's a split manifold, but regardless a 4 cylinder with true duals would have to have less than 1" pipes to not lose power. A 2" dual system would kill the exhaust velocity.

[ivorton74]

im not gonna get headers yet...im lookin into swappin in a 5.3/4l60...wont make sense getting those since the motor's comin out.

[cory d]

$20 glass pack, cut, zap it in, drive it until you redoe the exhaust. 20 bucks, 20 minutes, twice the CFM

[Billett]

If the exhaust you have already works with no problems I'd just keep it until you can afford what you really want.

[Billett]

Here's a bit of info that helped me make my decision:

It's all about what sound you like. Flowmasters do flow less than other brands. I'll never claim differently. However, magnaflows flow about 30 CFM more, and make a whopping 3 more hp and 1 ft lbs of torque than a 2 chamber flowmaster. Both measure out at roughly the same decibel level throughout the power band. For comparison, a Hooker Max Flow flows 270 CFM more than a flowmaster and makes 4 more hp and 2 ft lbs of torque.

This means on your average DD the flow really doesn't make a d@mn bit of difference. It comes down to what sound you want to hear when you turn that key. Oh, and definitely go stainless.