~Official~ IS300 Header Thread - Lexus IS Forum
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post #1 of 238 (permalink) Old 04-25-2011, 06:54 AM Thread Starter
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~Official~ IS300 Header Thread

~Header Info Thread ~feel free to add info , ask questions , comments and or concerns.....

Stickys/General
https://my.is/forums/f88/so-one-more-...eaders-385201/
https://my.is/forums/f88/newbie-go-fa...d-here-340884/
https://my.is/forums/f88/is300-bolt-u...2009-a-342460/
https://my.is/forums/f62/faq-headers-...tricks-268799/

Megan Headers
https://my.is/forums/f88/megan-header...askets-423777/
https://my.is/forums/f88/catless-loss-power-413228/
https://my.is/forums/f88/megan-vs-obx-421808/
https://my.is/forums/f88/brief-megan-...-video-435903/


OBX/turboeast
https://my.is/forums/f88/best-place-b...eaders-295708/
https://my.is/forums/f88/obx-headers-411840/
https://my.is/forums/f88/obx-short-runner-header-381588/
https://my.is/forums/f88/obx-header-question-378801/
https://my.is/forums/f88/obx-short-ru...w-pics-346287/

Mazzuri Headers
https://my.is/forums/f88/welds-mazzur...1-09-a-389538/
https://my.is/forums/f88/mazzuri-head...rences-379405/
https://my.is/forums/f88/mazzuri-powe...rences-362421/
https://my.is/forums/f88/my-review-st...d-ugly-349374/

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



Ebay Headers
https://my.is/forums/f88/60-hp-headers-422582/
https://my.is/forums/f88/anyone-ever-...eaders-426600/
https://my.is/forums/f88/headers-brand-423294/
https://my.is/forums/f88/jvt-racing-headers-397203/
https://my.is/forums/f88/picked-up-new-header-377680/
https://my.is/forums/f88/header-go-me...ng-jvt-372302/

Magnaflow headers. (49 state legal)
https://my.is/forums/f88/new-headers-...81/index3.html

Stock/OE headers
https://my.is/forums/f88/cat-delete-stock-header-446986/
https://my.is/forums/f88/how-heavy-st...market-239787/


Y-pipes
https://my.is/forums/f88/analysis-sto...-dynos-209937/
https://my.is/forums/f88/question-megan-y-piping-425079/


CEL
https://my.is/forums/f88/cel-due-headers-sigh-418187/
https://my.is/forums/f88/ok-i-need-he...-light-424981/
https://my.is/forums/f88/another-mega...nquiry-420824/
https://my.is/forums/f88/o2-sensors-c...iagram-381832/
https://my.is/forums/f88/my-header-o2...roblem-357175/

O2 sims
https://my.is/forums/f115/oxygen-sensors-faq-334479/
https://my.is/forums/f206/tokensoluti...ite-up-410399/
https://my.is/forums/f206/tutorial-co...-p0430-408951/
https://my.is/forums/f67/is300-how-in...ulator-342693/
https://my.is/forums/f88/product-revi...delete-391417/
https://my.is/forums/f67/is300-p0161-...ee-fix-342692/
https://my.is/forums/f88/o2-delete-436099/#post6518893
https://my.is/forums/f88/product-revi...delete-391417/

Header Wrap / Header Heat Shields
https://my.is/forums/f88/header-wrap-416309/
https://my.is/forums/f88/pics-ceb-hea...38/index4.html
https://my.is/forums/f174/heat-shields-381271/

Questions/Comments
https://my.is/forums/f88/headers-y-pi...stions-411426/
https://my.is/forums/f88/header-hi-fl...s-room-405738/
https://my.is/forums/f88/header-opinions-404125/
https://my.is/forums/f88/supra-na-hea...-topic-401200/
https://my.is/forums/f88/cel-problem-headers-393234/
https://my.is/forums/f88/y-pipe-do-yo...ts-its-392958/
https://my.is/forums/f122/headers-391503/
https://my.is/forums/f88/choose-your-...ri-etc-348023/
https://my.is/forums/f88/headers-wont-fit-update-355242/
https://my.is/forums/f88/im-new-want-...-is300-343378/
https://my.is/forums/f88/my-best-header-set-up-415070/
https://my.is/forums/f88/smashing-ben...eaders-413113/
https://my.is/forums/f88/catless-loss-power-413228/

Sounds
https://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

https://my.is/forums/f174/stepped-pri...thread-443409/

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Last edited by Bezik777; 04-03-2013 at 04:10 PM. Reason: updated again
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post #2 of 238 (permalink) Old 04-25-2011, 08:12 AM Thread Starter
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My Mazzuri Headers V2 w/custom 3in y-pipe (will be wrapped and sealed)

Not for sale nor will they be for long time , for your veiwing pleasure only

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post #3 of 238 (permalink) Old 04-25-2011, 09:33 AM
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Excellent thread bro, nice work!

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post #4 of 238 (permalink) Old 04-26-2011, 08:57 AM
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all u need to know about headers nice work
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post #5 of 238 (permalink) Old 04-26-2011, 11:59 AM
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I didn't see it referenced above, so I'll ask.
What information is out there for the best fitting header without leaks?
I'm more interested in a header that is easy to live with, than the amount of power it makes.

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post #6 of 238 (permalink) Old 04-26-2011, 12:16 PM
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Best bet is to weld. If you don't want to do that then apply red gasket maker for a solid seal. Use new gaskets as well. Always make sure to re-tighten your flange bolts every 6 months or so. I heard that mixing oem headers to after Y or vice versa well lead to major leaks.

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Last edited by sway162; 04-26-2011 at 12:25 PM.
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post #7 of 238 (permalink) Old 04-26-2011, 03:13 PM
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Quote:
Originally Posted by sway162 View Post
Best bet is to weld. If you don't want to do that then apply red gasket maker for a solid seal. Use new gaskets as well. Always make sure to re-tighten your flange bolts every 6 months or so. I heard that mixing oem headers to after Y or vice versa well lead to major leaks.
When you say use new gaskets, what is your opinion on OEM gaskets? I am thinking about just doubling up on the gaskets to get a tighter seal. I can't seem to find any aftermarket gaskets worth while.. I have a Toyomoto header and megan y-pipe. From what I read, the fitment isn't going to be great and I am just wondering if a couple gaskets and gasket sealer will work?
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post #8 of 238 (permalink) Old 04-26-2011, 03:22 PM Thread Starter
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Quote:
Originally Posted by sway162 View Post
Best bet is to weld. If you don't want to do that then apply red gasket maker for a solid seal. Use new gaskets as well. Always make sure to re-tighten your flange bolts every 6 months or so. I heard that mixing oem headers to after Y or vice versa well lead to major leaks.
Great information , this all sounds like something id tell someone

Quote:
Originally Posted by ryanriffel86 View Post
When you say use new gaskets, what is your opinion on OEM gaskets? I am thinking about just doubling up on the gaskets to get a tighter seal. I can't seem to find any aftermarket gaskets worth while.. I have a Toyomoto header and megan y-pipe. From what I read, the fitment isn't going to be great and I am just wondering if a couple gaskets and gasket sealer will work?
You can search locally some muffler shops will make gaskets for you (the good ones) or they may know a place....

OEM can work also ....Get them tight (exhaust flange bolts)and check them once in a while, they like to come loose..

Its not that the filemant is bad its that the pipe diameters are different and megans run bigger then the rest for the most part and with that said one pipe diameter increased then the other over short amount of time the exhaust preasure will blow out the gaskets (most on the bottom) due to the difference....Ill try and look up tubing diameter differances and will post it ...

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post #9 of 238 (permalink) Old 04-26-2011, 03:30 PM
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This!^ haha

I was waiting for you to chime in Tom! Pretty much everything I learned in the go fast section is from you and Donnie! lol

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post #10 of 238 (permalink) Old 04-26-2011, 03:33 PM
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^^ Thanks a lot for the information. I am going to look a little harder into getting one made but in the meantime I will see If i can get a seal out of OEM gaskets, some gasket maker and my muscles lol.
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post #11 of 238 (permalink) Old 04-26-2011, 03:40 PM
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I am currently using OEM gaskets with mine and sealed it up with the gasket maker. Been solid so far (knock on wood).

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post #12 of 238 (permalink) Old 04-26-2011, 03:44 PM
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Haha k good to know. Question though, if I took both my y-pipe and headers to a friends to weld before my install, how easy would the headers and y-pipe (as one piece) slide into place.. if at all?
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post #13 of 238 (permalink) Old 04-26-2011, 08:34 PM
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^ good question. When I re-install my headers for spring I'm half tempted to try it with the y-pipe bolted up to it. It wont be for another 2 weeks at least though so hopefully someone answers by then

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post #14 of 238 (permalink) Old 04-27-2011, 02:06 PM Thread Starter
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Quote:
Originally Posted by Rockhard View Post
^ good question. When I re-install my headers for spring I'm half tempted to try it with the y-pipe bolted up to it. It wont be for another 2 weeks at least though so hopefully someone answers by then
Never tryed it lol but id see having a lift a must if you were going to try....

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Yeah that is what I was thinking. I am going to give it a go with my lift and see what happens.
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