http://www.ebay.com/itm/DC-Sports-C...-06-Matrix-Exc-XRS-/301857459766?hash=item46481b4e36:g:E4AAAOSw1x1UNXLQ&vxp=mtr

You also have a hidden bolt to remove on the bottom of your exhaust manifold from the passenger side, by the way.


Fel-Pro # MS93909 Exhaust manifold (header) gasket

http://www.rockauto.com/en/catalog/...atalog/toyota,2005,corolla,1.8l+l4,1433059,exhaust,exhaust+manifold+gasket,5400

Fel-Pro # 61106 Exhaust manifold (header) flange gasket (2.40" ID donut)

http://www.rockauto.com/en/catalog/...alog/toyota,2005,corolla,1.8l+l4,1433059,exhaust,pipe+flange+gasket+/+seal,5836

Dorman # 675221 Manifold Bolt and Spring Kit

http://www.rockauto.com/en/catalog/toyota,2005,corolla,1.8l+l4,1433059,exhaust,bolt+/+spring,10741

 

Thanks man! I was unsure what brand to go with and which donut gasket went against the header manifold. I would have never thought to buy new bolts as well.

 

I ordered everything last night for the header job.


Does anyone know what size nuts (or a Toyota p/n) are used to attach the header to the engine block. I would like to replace these as well if I can.


Thanks
Cody

 

They're torqued to 27 ft-lbs.

 

invader


You are an invaluable resource to this form! I appreciate all of the information you have thrown my way since I have joined the forums here. Keep up the great work man!

 

It has been a while sense I have been around the form. I am taking an interest in doing a little work on my 12 year old car aging.


When replacing the header, I wound up having to replace the O2 sensor considering I snapped the original one off while trying to remove it from the manifold. It wound up costing an additional $90 I believe.


Anyway, I noticed a noticeable improvement in the midrange RPM performance with this manifold swap. I would definitely recommend it if you have the money. I would expect the total cost with a new O2 sensor to be in the neighborhood of around $400 with the sensor.


It has been on for 11 months now and it performs better now than the day I bought the car.

 

You mean you got a DC Sports exhaust header to replace your stock exhaust manifold?

 

Yes, I purchased a DC Sports DCS-THC4405 exhaust header to replace my stock manifold on my 1ZZ-FE 05 Corolla.

 

That's great. It is the best single mechanical mod for it... It's pretty obvious once you see the actual difference.

 

I will have to agree with you on that. It is the best mod I have done to the car thus far.


Also, the 10MMx1.25 nuts were too large for the exhaust studs. I wound up having to the original nuts to install the new manifold.


I believe they are actually 8mm x 1.25 incase anyone else is looking to perform the same mod. Also, below is a link to the O2 sensor I installed.


Denso 234-9052 https://www.amazon.com/gp/product/B0018JSH02/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

 

I'm not sure where I saw it was M10 x 1.25, but I see it here again as listed by Rock Auto:

http://www.rockauto.com/en/catalog/...05,corolla,1.8l+l4,1433059,exhaust+&+emission,exhaust+flange+stud+and+nut,13936

I'll just see what size is on mine...

 

I'm not sure where I saw it was M10 x 1.25, but I see it here again as listed by Rock Auto:

http://www.rockauto.com/en/catalog/...05,corolla,1.8l+l4,1433059,exhaust+&+emission,exhaust+flange+stud+and+nut,13936

I'll just see what size is on mine...

It really does not matter unless someone winds up stripping the original nut trying to get it off. I just wonted to mention that the M10 x 1.25 did not work for me. :grin:

 

I saw no need to ever replace my original exhaust manifold nuts and gasket on my header which I've removed again recently... I swear I'll get to the bottom of this though and see if they're not M10 x 1.25 as is alleged.

 

That would be great information for this thread. It has been a while, but I just remember the ARP M10 x 1.25 nuts just sliding right over the studs and not actually being able to tighten them. My original nuts were in great condition so I didn't have second thoughts reusing them. I will say one tip when working on a car, I always use anti-seize on bolts/nuts that might need to be removed again.