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~Official~ IS300 Header Thread

175K views 242 replies 73 participants last post by  Bezik777 
#1 · (Edited)
~Header Info Thread ~feel free to add info , ask questions , comments and or concerns.....

Stickys/General
http://my.is/forums/f88/so-one-more-time-headers-385201/
http://my.is/forums/f88/newbie-go-fast-stuff-link-thread-read-here-340884/
http://my.is/forums/f88/is300-bolt-...569-items-now-listed-v3-2-4-15-2009-a-342460/
http://my.is/forums/f62/faq-headers-install-how-tips-tricks-268799/

Megan Headers
http://my.is/forums/f88/megan-headers-blown-gaskets-423777/
http://my.is/forums/f88/catless-loss-power-413228/
http://my.is/forums/f88/megan-vs-obx-421808/
http://my.is/forums/f88/brief-megan-headers-review-video-435903/


OBX/turboeast
http://my.is/forums/f88/best-place-buy-turboeast-obx-headers-295708/
http://my.is/forums/f88/obx-headers-411840/
http://my.is/forums/f88/obx-short-runner-header-381588/
http://my.is/forums/f88/obx-header-question-378801/
http://my.is/forums/f88/obx-short-runner-header-installed-w-pics-346287/

Mazzuri Headers
http://my.is/forums/f88/welds-mazzuri-headers-installed-updated-06-11-09-a-389538/
http://my.is/forums/f88/mazzuri-header-v1-v2-differences-379405/
http://my.is/forums/f88/mazzuri-power-differences-362421/
http://my.is/forums/f88/my-review-story-mazzuri-header-good-bad-ugly-349374/

Dezod Header
http://my.is/forums/f88/dezod-green-header-review-458866/



Ebay Headers
http://my.is/forums/f88/60-hp-headers-422582/
http://my.is/forums/f88/anyone-ever-seen-these-headers-426600/
http://my.is/forums/f88/headers-brand-423294/
http://my.is/forums/f88/jvt-racing-headers-397203/
http://my.is/forums/f88/picked-up-new-header-377680/
http://my.is/forums/f88/header-go-megan-hpracing-jvt-372302/

Magnaflow headers. (49 state legal)
http://my.is/forums/f88/new-headers-magnaflow-headers-vids-up-409481/index3.html

Stock/OE headers
http://my.is/forums/f88/cat-delete-stock-header-446986/
http://my.is/forums/f88/how-heavy-stock-headers-compared-aftermarket-239787/


Y-pipes
http://my.is/forums/f88/analysis-stock-vs-aftermarket-ypipe-aftermarket-header-dynos-209937/
http://my.is/forums/f88/question-megan-y-piping-425079/


CEL
http://my.is/forums/f88/cel-due-headers-sigh-418187/
http://my.is/forums/f88/ok-i-need-help-check-engine-light-424981/
http://my.is/forums/f88/another-megan-header-y-pipe-inquiry-420824/
http://my.is/forums/f88/o2-sensors-cel-code-diagram-381832/
http://my.is/forums/f88/my-header-o2-sim-p0420-problem-357175/

O2 sims
http://my.is/forums/f115/oxygen-sensors-faq-334479/
http://my.is/forums/f206/tokensolutions-pnp-02-delete-write-up-410399/
http://my.is/forums/f206/tutorial-configuring-gen1-5-pnp-delete-diy-resistor-mod-p0420-p0430-408951/
http://my.is/forums/f67/is300-how-install-o2-simulator-342693/
http://my.is/forums/f88/product-review-token-solutions-o2-heater-simulator-delete-391417/
http://my.is/forums/f67/is300-p0161-p0141-o2-heater-malfunction-free-fix-342692/
http://my.is/forums/f88/o2-delete-436099/#post6518893
http://my.is/forums/f88/product-review-token-solutions-o2-heater-simulator-delete-391417/

Header Wrap / Header Heat Shields
http://my.is/forums/f88/header-wrap-416309/
http://my.is/forums/f88/pics-ceb-heat-shield-252138/index4.html
http://my.is/forums/f174/heat-shields-381271/

Questions/Comments
http://my.is/forums/f88/headers-y-pipe-questions-411426/
http://my.is/forums/f88/header-hi-flow-cats-room-405738/
http://my.is/forums/f88/header-opinions-404125/
http://my.is/forums/f88/supra-na-header-can-work-edited-xerd-topic-401200/
http://my.is/forums/f88/cel-problem-headers-393234/
http://my.is/forums/f88/y-pipe-do-you-need-whats-its-392958/
http://my.is/forums/f122/headers-391503/
http://my.is/forums/f88/choose-your-header-obx-megan-mazzuri-etc-348023/
http://my.is/forums/f88/headers-wont-fit-update-355242/
http://my.is/forums/f88/im-new-want-more-power-my-is300-343378/
http://my.is/forums/f88/my-best-header-set-up-415070/
http://my.is/forums/f88/smashing-bending-firewall-headers-413113/
http://my.is/forums/f88/catless-loss-power-413228/

Sounds
http://my.is/forums/f88/exhaust-sound-rating-337995/
Megan headers
http://youtu.be/HVDI2ZsUxHs
http://youtu.be/VZ7GV3CaSPk
http://youtu.be/pvHQryVRkkE

Alphawerks Headers
http://youtu.be/XoMt6d0N8aI

Toyomoto Headers
http://youtu.be/3MSt-RO5XsE
http://youtu.be/Sp2WV83USV8

HP Headers
http://youtu.be/hd1rLgIxjXw
http://youtu.be/s13qajVlRJw

Xerd Headers
http://youtu.be/7D29NY_7_DQ

Mazzuri Headers
http://youtu.be/btL5jcCCR-Y
http://youtu.be/ljrK9iqOdf0
http://youtu.be/jNhxEHlx3Vw
http://youtu.be/rVLvLUVqbfs

OBX Headers
Short header
http://youtu.be/DjZnLCcnvi4
http://youtu.be/fqi2dEp84wk

Team Lexus
http://youtu.be/eTk0nWApkPM

Just Headers :)
http://youtu.be/faFa_WQXFlI
http://youtu.be/UoJSvOq4z4Q

More info and links coming soon (work in progress)~~~~~~~~~~~~~~~~~~~


Another new header in R+D from Figs

http://my.is/forums/f174/stepped-primary-length-optimized-header-dev-thread-443409/
 
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#122 ·
So I finally got around to wrapping my headers. What was supposed to be a few hour job turned to a few weeks lol. Just got busy and than the whole family got sick so never found the time to finish it through.
Here's a pic of his the header and y-pipe look before. Bought them used.


Sanded them down to remove minor rust and had to use some rust remover for the y-pie which was a little worse but not too bad. Got everything taped up to prevent paint from getting inside.

And here is the after shot once painted with VHT high temp paint.



That was one day of work about a couple of weeks ago. Had to stop and got to wrapping today. My first time so if the veterans sees something I did wrong, please point it out. Got a couple rolls for free from my bro in law so no problem re-wrapping.


I only used about 3/4 of a roll of wrap(2"x50 ft.). Tomorrow I will be spraying it with DEI Silicone Sealant Spray. Will post pics tomorrow. Hope this gives an idea to those who are planning on wrapping their headers for the first time. Wanted do take pics during the wrapping but found it kinda hard with fiberglass going everywhere lol. Enjoy!!
 
#124 ·
Lol thanks. Yeah it did get a bit frustrating trying to figure the best route to wrap without overlapping like crazy but everything worked out. After the first couple runners I started getting the hang of it.
 
#127 ·
Megan header with cat or Magnaflow header

Its time to replace the factory header so I've come up with two options to be approximately emissions compliant.

Option A) Megan header and downpipe with a single cat welded into the downpipe

Option B) Magnaflow header and megan downpipe (no cat in downpipe)

I want to run a catalytic converter and remove the factory pieces as they are likely all dead or dying. With either setup I can make the ecu happy with minimal or no extra cost. And the cost between the two setups is negligible...

So the question is will two cats on the header be more efficient than one in the downpipe?
 
#128 ·
Don't know piping diameter on magnaflow header and how well it will mate to megan y pipe but I've heard good things about it tho a little over priced. It would be better then just one cat in y pipe but you might get a better gasket seal with Megan header to Megan y pipe but you could just have a shop weld it...
 
#134 ·
I like that DEI Black silicon sealant on the wrap. Looks stealthy. Be sure to add about 3-5 coats of the silicon sealant. Once it gets hot from the manifold it kinda burns off and gets thin. You'll notice a weird smell coming from your exhaust manifold for about 2 weeks as it burns and cures.
 
#135 ·
Thanks for the advice. Yeah, I went j er it a few times since I had a whole bottle and just that to spray. Hope it don't smell too bad, don't want my kids getting high lol. Ima be doing that 30 min curing process first that was recommended by VHT. 10 min on and let cool. Than 20 min on let cool. But I see why you say it would smell for the first couple weeks.
 
#143 ·
Curing it while bolted on the car is fine. I just chose to do it this way so when I spray it with the hi temp spray it will be dry. Basically I just took my heat gun and just heated up each runner for about 20 minutes, it got the wrap all nice and toasty. I then let it sit over night, maybe tonight I will get to spraying it.

-Nyke
 
#147 ·
I might get on it this week. Just going to use copper gasket maker since my other gaskets suck. I figured I will bolt it up then let the gasket maker cure for a day then fire it up and hope for the best.

Sent from my HTC Sensation 4G using AutoGuide.com App
 
#148 ·
i was gonna order me up a obx header ypipe combo but never got around to it over the weekend. i made it on ebay yesterday and seen a used obx header for 65 so i jumped on it its even gotta extra bung for wideband. they mustve been pretty close to me cause i got it today now who wants to sell me a y pipe for cheap.
 
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