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Unread 03-02-2008, 12:41 PM   #1
JohnD
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Default Headers for the 4th gen!

I found these, they are sick I order a set for the runner. hAs anyone installed a set of these. I also order a throttle body spacer from air-raid.. I got the cermaic/titanium headers.

link: http://www.jbaheaders.com/feature_pages/05Tundranew.asp


pic:


Im also gonna remove the 2 cats after the o2 sensors, and do an exhaust correction into a y pipe..


cool article here: http://www.jbaheaders.com/assets/art...wdsuv_1005.pdf

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Last edited by JohnD; 03-02-2008 at 12:43 PM.
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Unread 03-02-2008, 02:20 PM   #2
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I've got JBAs on my mustang, they're a top-notch shorty header. Unfortunatelly, power gains from shorty headers are minimal, I've never seen real world dynos produce the same results that magazines get.
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Unread 03-02-2008, 03:05 PM   #3
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My 2c.

Throttle body spacers are useless on most modern engines, so you might want to save your $$$.

Also make sure those headers will fit in a 4th Gen. The underhood space in a 4Runner is a bit more limited than a Tundra. Just some thing to think about.

You also would want to check about the URD Y pipe for the FJC to see if ti will fit the 05+ V8 and V6 4Runner. Might allow you to have a bolt insolution to eleimnate the cats and bolt stuff back for SMOG checks.
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Unread 03-02-2008, 04:11 PM   #4
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Andries interesting! I was told by a few that the only 2 cats that matter are the ones b4 the 02 sensors the ones after are there so the 4runner achieves LEV(low emmison vehicle) standards.. as for the space that is my biggest worry right now is if they fit.. will see i should have them by the end of the week..
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Unread 03-02-2008, 04:41 PM   #5
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Quote:
Originally Posted by JohnD View Post
Andries interesting! I was told by a few that the only 2 cats that matter are the ones b4 the 02 sensors the ones after are there so the 4runner achieves LEV(low emmison vehicle) standards.. as for the space that is my biggest worry right now is if they fit.. will see i should have them by the end of the week..
Dunno, but I would expect the SMOG inspection to be tough without those cats, especially the visual part. I believ the first cats do most of the work, but they can still fail you on SMOG with just teh visual inspection, maybe a smog specialist can pipe up.

See fi the URD Y pipe will fit the 4Runner as it will allow you an easy bolt in solution, which will be reversible as well.

Teh older V8 4Runners had only 3 cats, and the 3rd cat looks to be quite a bit of abottleneck and I plan to replace it with a 2 into 1 high flow cat at some point.
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Unread 03-03-2008, 12:10 PM   #6
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those are pretty cool they'll probably give you a few more mpg's and juice up your torque lbs. And your HP thinking about getting some for the FJ

Anyone know the prices and the different coatings they have and what differences are between them???
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Unread 03-03-2008, 01:06 PM   #7
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Quote:
Originally Posted by FJCcrawler View Post
those are pretty cool they'll probably give you a few more mpg's and juice up your torque lbs. And your HP thinking about getting some for the FJ

Anyone know the prices and the different coatings they have and what differences are between them???


Pricing is at about $700.00(4.7l v8) for the titaimun/ceramic coating which will give you the best thermal protction under the hood. they have a stainless as well for slightly cheaper and regualr steel which is even cheaper. I also saw somewhere(cant remeber( The fj were somewhere in the $500 range(but dont quote me).. Good luck
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Unread 03-03-2008, 04:26 PM   #8
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Quote:
Originally Posted by JohnD View Post
Pricing is at about $700.00(4.7l v8) for the titaimun/ceramic coating which will give you the best thermal protction under the hood. they have a stainless as well for slightly cheaper and regualr steel which is even cheaper. I also saw somewhere(cant remeber( The fj were somewhere in the $500 range(but dont quote me).. Good luck
THANKS!!! I think i might get the ceramic try to keep things nice and cool down there
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Unread 03-04-2008, 07:09 PM   #9
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1. I hope they fit
2. Would the throttle body spacer improve low end tq? Looking at the dyno results, peak hp is up but low end suffers.
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Unread 03-05-2008, 04:02 AM   #10
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TB spacers are gimmicky, they don't really do anything on fuel injected vehicles.
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Unread 03-05-2008, 07:57 AM   #11
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Thats 3 dudes so far, so Im going to cancel the TB... thanks guys for the input..
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Unread 03-05-2008, 05:28 PM   #12
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very nice looking! its about DAYAMN time
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Unread 03-10-2008, 02:10 PM   #13
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Any update on this John? got me real curious wether these will fit or not
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Unread 03-10-2008, 03:10 PM   #14
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Quote:
Originally Posted by Bala de Plata View Post
Any update on this John? got me real curious wether these will fit or not


Im still waiting on em, should be here this week, hopefully. I wanted to get em installed b4 Utah trip doesnt look like thats goona happen. Fingers crossed..
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Unread 03-10-2008, 03:23 PM   #15
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How many of you drive your vehicles at the RPM range that the dyno showed the improvement?

Most of my driving is below 3000 RPM. Every now & then, I jump on the skinny pedel, and run it up to 5000 RPM; but that is VERY rare. When I do, I don't feel as if I am lacking any power (and I have a V6).

If I were drag racing, and keeping the RPM up in that range (3500 -5000 RPM), I would definitely do mods that provide this type of performance gain.

What I want is more torque between 1500 RPM & 3000 RPM!
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Unread 03-10-2008, 11:43 PM   #16
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headers, like intake or exhaust give much power alone, I dont think. But on the same hand I feel like if you are going to be adding intake and exhaust it makes sense to add headers too... :-D
Id like to know how they would improve the sound
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Unread 03-11-2008, 12:34 AM   #17
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the only portions left would be the manifold and Y pipe for complete engine breathing.
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Unread 03-11-2008, 07:39 AM   #18
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Quote:
Originally Posted by Photog View Post
How many of you drive your vehicles at the RPM range that the dyno showed the improvement?
Me = ALOT

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Unread 03-11-2008, 09:12 AM   #19
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Quote:
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Me = ALOT

Then you would be a 4Runner owner, that would gain some benefit from adding these headers. When are you installing yours?
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Unread 03-11-2008, 10:03 AM   #20
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I am waiting to see if I may benefit from JohnD's project. If all goes well, I will be installing some fairly soon.
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