dual vs single exhaust

[blake0521]

Was looking on your web site and it claims that the dual gets you 14 hp and the single gets you 10. Whats the reason behind this? You would think that the single would out flow the dual since there are less bends but i sounds like I am wrong.

I am getting into the 300's for whp and want to free up some extra power and get some better sound. I was leaning toward the single since it is much lighter and also cheaper but I am not sure. Thanks!

[08.5MS3]

Get the triple for maximum horsepowazzz.

[blake0521]

Thanks.... Real comments would be great. Found info one other sites mostly about evos and why most high powered build on that platform use single exit. They said it is for weight reduction and also has a marginal power increase. Wanted to know why the slight power increase does not ring true on our platform or if they just simply tested the dual exit with more mods. Right now still leaning toward single since it is cheaper, lighter and will allow me to spend that extra money on some more parts. Just confused why it is rated lower when it has the same tubing size and all that.
@CorkSport;

[08.5MS3]

It's a fucking pipe. End real comment.

[mxlplx71]

The single does weigh less, its louder. It also has a little more backpressure.
2 mufflers is quieter but flows a "little" more.

Go listen to soundclips on YouTube.

[blake0521]

Not too worried about sound just trying to figure out if its worth the extra cash to go dual or if single will be a good route. Just waiting on cork sport to respond back on if it does truly make less power for some reason or what. Seems weird that it would since evo's make more power with a single exit.

You would think that the extra bend to make it dual exit would be less efficient then a straight through design. I wouldn't think a single exit would have more back pressure since the route is straighter. Hints why I am asking cork sport the question.

and sorry if you think my question is dumb. I am curious so I thought I would ask. If you think it is dumb then don't comment. No one is making you read or respond to this thread. Think it is reasonable to ask since the data does not line up with the data from my other research.

[Agent_Orange]

Two exits overcome the inefficiency caused by the extra bends.

It's 4 hp. The difference is negligible. May as well be 0.

[dev]

Originally Posted by Agent_Orange Two exits overcome the inefficiency caused by the extra bends. It's 4 hp. The difference is negligible. May as well be 0.

Wouldn't even register on the butt dyno.

[08.5MS3]

Originally Posted by blake0521 and sorry if you think my question is dumb. I am curious so I thought I would ask. If you think it is dumb then don't comment. No one is making you read or respond to this thread. Think it is reasonable to ask since the data does not line up with the data from my other research.

There are a myriad of reasons why the HP numbers are different. But I'd venture to say that it is not statistically significant.

[Castillo817]

I will be getting their single exit cbe since I myself have a single exit on my pu and it's amazing. Love the tone. And even with the dual and single exhaust, the numbers will not be significantly different

[blake0521]

think i will just save the weight and go single then. Already added a bunch of weight from mods so taking a few pounds off should help!

[Castillo817]

Yea man you won't regret it!

[razerer]

Find a Mazda 3 bumper if you don't want an empty bumper cut out.. Just a thought

[Brandon@corksport]

Originally Posted by blake0521 Not too worried about sound just trying to figure out if its worth the extra cash to go dual or if single will be a good route. Just waiting on cork sport to respond back on if it does truly make less power for some reason or what. Seems weird that it would since evo's make more power with a single exit. You would think that the extra bend to make it dual exit would be less efficient then a straight through design. I wouldn't think a single exit would have more back pressure since the route is straighter. Hints why I am asking cork sport the question. and sorry if you think my question is dumb. I am curious so I thought I would ask. If you think it is dumb then don't comment. No one is making you read or respond to this thread. Think it is reasonable to ask since the data does not line up with the data from my other research.

Like others have said. The power difference is negligible if there is one at all. The majority of the exhaust comes out of the drivers side on ours any way because of the way it is plumbed.

If looks do not matter to you there really a need to go with the dual. Especially, when its gonna save you a chunk of change.

[robander3]

I have also heard singles don't "drone" as much as double on the highway

[SpencerC]

I would actually believe the single drones more, but that's just me.

Also, the power difference is negligible, probably just a difference in the dyno pull we did that day... consider the fact that we did them several years apart.

[g00s3y]

Originally Posted by blake0521 I am getting into the 300's for whp

I am wondering how you decide that you have 300+hp when you don't even have a tune...

Just go with quad pipes, more space available for air to flow though, more hp.