no exhaust manifold?

[2013_Si_Guy]

So i was at work yesterday performing an oil change and rotate on my car (gotta love working as a service tech and having access to a lift) when I was doing an inspection I noticed that the exhaust manifold is integrated into the head. I was surprised. I guess that is why people are putting such emphasis on changing out the dp. What was honda thinking putting a 90 degree angle at the bottom of the dp? Crazy!

 

[squiggy]

What was honda thinking putting a 90 degree angle at the bottom of the dp? Crazy!

Sound reduction.

 

[2013_Si_Guy]

I can see that.

 

[webby]

I guess that is why people are putting such emphasis on changing out the dp.

you're removing 2 catalytic converters.... or 1 converter if you go with a downpipe/high flow cat combo. That is freeing up a ton of hp/tq

 

[squiggy]

I can see that.

Of course it is also at the expense of power, too. I agree that it is an odd choice for Honda on their performance tier.

 

[2013_Si_Guy]

Right?! So what about the exhaust manifold being integrated in with the head. I guess it saves me money now that I don't have to buy a header. All those dp dyno numbers do you think those are accurate? Ifso I need to j7mp on the bandwagon and grab one.

 

[squiggy]

Right?! So what about the exhaust manifold being integrated in with the head. I guess it saves me money now that I don't have to buy a header. All those dp dyno numbers do you think those are accurate? Ifso I need to j7mp on the bandwagon and grab one.

It is most likely purely a cost consideration on Honda's part. There is no reason to believe that hp numbers are not accurate. Replacing the stock dp removes a ton of restriction.

 

[Flippercon]

Yeah the bubblegum welds and the turns hold back a lot. Its a great investment. From what I have read they integrated the header to the head to compensate for bottom end torque.

 

[2013_Si_Guy]

Thanks nice to know.

 

[XdemonicfleasX]

I had a catless when I had my 9th. Trust me you will feel the difference.

 

[2013_Si_Guy]

I plan on getting flashpro in the next 2 months. Would anything happen if I go catless on a stock tune? What dp would be best to go with. I want to make sure im not going to have to deal with cracking...

 

[webby]

You just won't see the full amount of gains without having it tuned. Others have said it is night and day before/after the tune. Best downpipe - you'll get different answers from every user who has one brand over another. They're all extremely similar - see pics in this thread
http://9thcivic.com/forum/threads/2012-civic-downpipe-list-with-product-info-links.6853/

main difference is the size of the piping.

 

[323]

You'll get a CEL without flash pro or a defouler

 

[2013_Si_Guy]

A lot of kits include defoulers I've seen... I plan on running my stock exhaust for a little while. Is the dp a direct replacement for the stock dp or will some modifying be necessary? Ohh btw guys I really appreciate all your help and info. Its better that I find out from those who have "been there and done that"

 

[2013_Si_Guy]

Than find out on my own and ruin something or waste time and money.

 

[323]

Is the dp a direct replacement for the stock dp or will some modifying be necessary? Ohh btw guys I really appreciate all your help and info. Its better that I find out from those who have "been there and done that"

Yes it is a direct bolt on.
And that's what we're here for!
Tell your friends

 

[webby]

http://9thcivic.com/forum/threads/how-to-install-a-rv6-2012-civic-si-bellmouth-downpipe.5727/
http://9thcivic.com/forum/threads/full-race-3-downpipe-and-catback-exhaust-system.8505/