Dual exhaust worth the money

BlackMagnum2000 · Feb 4, 2016

It's no secret that dual exhaust, in most cases, will out perform a single exhaust. That being said, dual exhaust definitely costs more.

So my question is a pretty general question. And yes it's been discussed plenty. But I wanted to hear from you guys.

Do you think dual exhaust is worth the extra money?

Because for what I'm looking at, it will cost $120 extra in just one extra muffler and test pipe. Not including the extra piping.

If I was to go with a Y pipe set up, do you have any suggestions on what I should run? I was thinking 2.5" into a Y collector, then 3" through my fake cat/test pipe, my muffler, out to my tips (side dump). Or should I run different diameter? Or suggestions on the Y collector? I'm not really sure.

MagSport · Feb 4, 2016

It all really depends what you want to do with the motor. If you are building the motor for top end, true duals with larger diameter will probably be your best bet. This would also be true if you were planning on running forced induction. But if you don't plan on building your motor for top end, I'd leave it with single and fake duals. Suppose you had plans for twin turbos, I would probably tell you to go get true duals with 3in diameter all the way out. Granted, You would lose a lot of my bottom end until You set the turbo system up, but there would be no sense in doing the exhaust system twice.
To answer your question, yes I think dual exhaust is worth the money if it's set up right and you have enough mods to really make use of it. You should also consider your future plans for the motor too when deciding.

charonblk07 · Feb 4, 2016

Wow, someone else that doesn't think that bigger is better, surprising. To add to that, if you are planning on leaving it fairly stock-ish then you don't need to be running 3" duals, a 2.5" dual is more than enough to keep the flow velocity and temperature up. If you went with a merge system (like stock) then 3" into a 2.5" after the muffler is generally fine.

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dapepper9 · Feb 4, 2016

charonblk07 said:
Wow, someone else that doesn't think that bigger is better, surprising. To add to that, if you are planning on leaving it fairly stock-ish then you don't need to be running 3" duals, a 2.5" dual is more than enough to keep the flow velocity and temperature up. If you went with a merge system (like stock) then 3" into a 2.5" after the muffler is generally fine.

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No were pretty educated here

2.5" dual is too big though for even built n/a stock displacement motor unless you went with a nice restrictive flowmaster. Otherwise you lose too much low end. If you're getting the spintech mids id just get the full 3" single and go out to fake duals if you want the dual look. That's partly my opinion and opinions are like assholes, everybody has one lol.

Rustycowl69 · Feb 4, 2016

Not so much, now, but I used to see some dual conversions with soda-straw tail pipes. Man, that looks so stupid! Don't they realize that flow is related to cross sectional area? The area goes by the square of the pipe radius. So, for instance, a single 3" has more area than dual 2" pipes. If it's done right, there's nothing wrong with a good single exhaust.

charonblk07 · Feb 4, 2016

dapepper9 said:
No were pretty educated here

2.5" dual is too big though for even built n/a stock displacement motor unless you went with a nice restrictive flowmaster. Otherwise you lose too much low end. If you're getting the spintech mids id just get the full 3" single and go out to fake duals if you want the dual look. That's partly my opinion and opinions are like assholes, everybody has one lol.

We're; I'd; [emoji1]

Maybe not SO educated, lol.

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dapepper9 · Feb 4, 2016

charonblk07 said:
We're; I'd; [emoji1]

Maybe not SO educated, lol.

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Autocorrect

BlackMagnum2000 · Feb 4, 2016

MagSport said:
It all really depends what you want to do with the motor. If you are building the motor for top end, true duals with larger diameter will probably be your best bet. This would also be true if you were planning on running forced induction. But if you don't plan on building your motor for top end, I'd leave it with single and fake duals. Suppose you had plans for twin turbos, I would probably tell you to go get true duals with 3in diameter all the way out. Granted, You would lose a lot of my bottom end until You set the turbo system up, but there would be no sense in doing the exhaust system twice.
To answer your question, yes I think dual exhaust is worth the money if it's set up right and you have enough mods to really make use of it. You should also consider your future plans for the motor too when deciding.

Well I'll probably end up replacing my exhaust by the time I stroke and boost it lol. I've already redone my exhaust system once. I'm just thinking if it's worth the money for my current situation, as money is tight right now.

charonblk07 said:
Wow, someone else that doesn't think that bigger is better, surprising. To add to that, if you are planning on leaving it fairly stock-ish then you don't need to be running 3" duals, a 2.5" dual is more than enough to keep the flow velocity and temperature up. If you went with a merge system (like stock) then 3" into a 2.5" after the muffler is generally fine.

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My plan for duals was 2.25" being I'll have no cats, good flowing mufflers, and side dumps, not a full exhaust.

dapepper9 said:
No were pretty educated here

2.5" dual is too big though for even built n/a stock displacement motor unless you went with a nice restrictive flowmaster. Otherwise you lose too much low end. If you're getting the spintech mids id just get the full 3" single and go out to fake duals if you want the dual look. That's partly my opinion and opinions are like assholes, everybody has one lol.

Yeah I don't want to loose low end. That's what tricks me into thinking my truck is fast :roflsquared:

That being said, is 3" too big if I don't have a cat and I'm not going all the way back? I'm very conflicted lol

Stegs · Feb 4, 2016

in my opinion

keep you stock exhaust the way it is, but replace the cat (if you need one) and go with a higher flowing muffler (dynomax or magnaflow)

I have dual exhaust on my truck, i put it on when i was 16 b/c that was the "cool" thing to do

Im now 28 and want the stock exhaust back. Im searching craigslist for people parting out a 98-01 reg cab/short box to buy the exhaust

I know the stock is restrictive, but thats b/c of the cat/muffler

I have a magnaflow high flow cat on my truck, with a stock exhaust and a 18" magnaflow oval muffler.....that would be sweet...

My opinion, dont do duals, keep what you have and modify the cat/muffler

trust me, you wont regret it....like i do now

BlackMagnum2000 · Feb 4, 2016

Stegs said:
in my opinion

keep you stock exhaust the way it is, but replace the cat (if you need one) and go with a higher flowing muffler (dynomax or magnaflow)

I have dual exhaust on my truck, i put it on when i was 16 b/c that was the "cool" thing to do

Im now 28 and want the stock exhaust back. Im searching craigslist for people parting out a 98-01 reg cab/short box to buy the exhaust

I know the stock is restrictive, but thats b/c of the cat/muffler

I have a magnaflow high flow cat on my truck, with a stock exhaust and a 18" magnaflow oval muffler.....that would be sweet...

My opinion, dont do duals, keep what you have and modify the cat/muffler

trust me, you wont regret it....like i do now

I don't have stock now. I've already picked out my muffler, which flows better supposedly that what you listed, and I won't be running a cat.

I'm just looking for the opinions on the value of duals and pipe diameter

Also you realize the exhaust changed in 2000, so you might want to be looking for a 00-01 reg cab short box

R/T_Fire · Feb 4, 2016

As mentioned its all dependent on the engine and flow of intake and heads etc etc.... I have always gone with the old timer info I was taught that you go with a larger pipe from header to muffler than muffler to tip... if your running a 2.5" to muffler step down to a 2.25" to the tip.. there is a balance that is based on performance of the motor but thats hard to explain on how to calculate. but there are formulas out there to figure out pipe size vs displacement and flow of heads..... on a 5.9L Id say a dual at 2.5 is about as large as you want to go

BBartow · Feb 4, 2016

For what you have now, 2.25" for duals or 2.5" for single

dodge dude94 · Feb 4, 2016

Stegs said:
in my opinion

keep you stock exhaust the way it is, but replace the cat (if you need one) and go with a higher flowing muffler (dynomax or magnaflow)

I have dual exhaust on my truck, i put it on when i was 16 b/c that was the "cool" thing to do

Im now 28 and want the stock exhaust back. Im searching craigslist for people parting out a 98-01 reg cab/short box to buy the exhaust

I know the stock is restrictive, but thats b/c of the cat/muffler

I have a magnaflow high flow cat on my truck, with a stock exhaust and a 18" magnaflow oval muffler.....that would be sweet...

My opinion, dont do duals, keep what you have and modify the cat/muffler

trust me, you wont regret it....like i do now

14in Maggy would be better

BlackMagnum2000 · Feb 4, 2016

BBartow said:
For what you have now, 2.25" for duals or 2.5" for single

Thanks, thats the kind of answer I was looking for, diameter wise lol. On the single, you think 2.25" before the Y and after the muffler (single in dual out) with 2.5" from the Y to the muffler?

1SilverBullet2 · Feb 5, 2016

If you're just doing a side dump, why not save some cash and do your own exhaust? If you can weld, then you can run exhaust. The only thing you'd need a exhaust shop for is any bends needed. If you ran duals then just use the existing factory pipe from the headers to where ever you needed, say the y pipe, and then do the rest yourself, that's just my take on it.

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BlackMagnum2000 · Feb 5, 2016

Lifted01 said:
If you're just doing a side dump, why not save some cash and do your own exhaust? If you can weld, then you can run exhaust. The only thing you'd need a exhaust shop for is any bends needed. If you ran duals then just use the existing factory pipe from the headers to where ever you needed, say the y pipe, and then do the rest yourself, that's just my take on it.

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I can't weld, and I don't have factory piping

1SilverBullet2 · Feb 5, 2016

BlackMagnum2000 said:
I can't weld, and I don't have factory piping

But you still have pipe from the headers back that you can work with is my point. It's all just a suggestion. I agree tho if you plan to do anything else with your engine and exhaust is that expensive; either wait until you build your engine more and then do exhaust or do it right once for down the road.

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BlackMagnum2000 · Feb 5, 2016

Lifted01 said:
But you still have pipe from the headers back that you can work with is my point. It's all just a suggestion. I agree tho if you plan to do anything else with your engine and exhaust is that expensive; either wait until you build your engine more and then do exhaust or do it right once for down the road.

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I'm going to be taking that pipe back and using the money for my exhaust.

1SilverBullet2 · Feb 5, 2016

BlackMagnum2000 said:
I'm going to be taking that pipe back and using the money for my exhaust.

Oh that's right, nevermind.

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Dual exhaust worth the money

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