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Honda Civic Si

When you put after market headers on 8th gen, does it replace your cat or go to it?

When you put after market headers on 8th gen, does it replace your cat or go to it?

Kile

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38 Answers

Nikki

depending on the header u get. skunk2 replaces the cat which is what i have. make sure u get a rear motor mount

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KileQuestion author

Why do I need to get a rear motor mount?

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Nikki

if u dont the header will hit subframe.

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KileQuestion author

Just the skunk2 will or all headers?

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Nikki

pretty sure most headers. skunk2 is best off the shelf header for our car. i honestly wouldn’t buy a diff brand

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Nikki

unless u wanna spend 1200 for a ASP custome built header lol

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KileQuestion author

Since it won’t have the cat doesn’t it make the engine light come on?

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Nikki

nope not if u have flashpro which u need to run a catless header too. and also get a oem 02 sensor extension from honda. its like 35.00

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Rafael

Wow.. I think @Nikki has made the most sense out of EVERYONE I’ve seen post on this whole group. ??

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Joseph

90 percent of well named brand header, will replace your factory cat. However vibrant use to sell hi flow cat header but they discontinued it. Now you have to mock up a hfc like berk and make it to were you can just remove it as you please

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Nikki

kyle are u going to cars in beaches june 6?? if so u will see my car there

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KileQuestion author

Where is it at? I havnt been to a car meet yet because they are so far away

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Nikki

its in ruskin like 30 min south of tampa

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KileQuestion author

Oh sweet I might go then. Is there like a page or something with an address

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Nikki

No photo description available.
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Nikki

No photo description available.
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Nikki

sorry i gave u the 2013 cars n beaches. its june 6. same address as the first one though.

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Tyler

http://afhkparts.com/ also have the o2 extender. I think it was 20 bucks. And I didn’t do the rear motor mount I did the stiffy

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KileQuestion author

What’s the stiffy?

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Tyler

An engine damper

No photo description available.
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Tyler

Ingalls stiffy.

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KileQuestion author

Is it easy to install?

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Tyler

Super easy I think it took 15 to 30 min it’s a breeze

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Joseph

I prefer rear mount… does a better job holding the motor down

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Nikki

exactly joe @Joseph

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Tyler

To each their own

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KileQuestion author

So if I want to change my headers I need a 02 extension, a tune because my cat will be gone. And a rear motor mount or damper?

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Nikki

i love my hasport mount and like joe said it is way better than the stock mounts. i have the 70a race spec

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Nikki

u don’t necessarily need a tune it depends. i bought a vittune but im running a 3.5 intake and the full
race exhaust as well

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Joseph

I mean in my opinion, the stiff is a waste of money. Honestly if you were some crazy build that requires more stiffness then a hasport rear and innovative mounts will get the job done better. And you don’t have to waste money on that and have to sell it to try and make up money

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Joseph

@Kile you need the o2 extention for the skunk2 header (in which btw is the best off the shelf header on the market) yes you’ll need a tune correct your fueling ignition timing and cam angle and a 70a hasport rear will do the job.

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Tyler

Well a waste to you Joe isn’t a waste to me like I said to each their own. The Ingalls does a damn great job on my car. And I didn’t have to mess with a mount. So it just depends on what the person wants to do.

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Nikki

i would rather have full mounts. but yea to each there own.

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Joseph

I’m just being honest Tyler. I’ve owned my fa5 for 5 years and I’ve seen alot of people buy the stiffy and then pull it and sell it. It’s better to do real mounts. Saves you money in the long run for the build that you do

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KileQuestion author

@Joseph the 70a hasport is the mount right?

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Joseph

Yes.

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Tyler

I didn’t say u weren’t joe. All I said was to each their own there is no wrong answer here and your all trying to say yours is the only possible solution. Both work. Both do the same damn job. Just depends on what that person wants to do to that persons car. Plain and simple

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Ryan

Hes right its not what u want. I 2nd what joe said up there. Ingals is shit real motor mounts ftw

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