Header question for 3.4 swap

chopperbob04 · 10-05-2009, 09:54 PM

I just started 3.4 swap saturday. Tried to order Downey headers but there out of business. Does anyone know what headers will fit or were to get a set of Downey headers. Thanks.

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yodathespian87 · 10-06-2009, 07:57 AM

I heard that ebay has them, other then that check Craigslist. There are a few other brands but haven't seen them used on this site.

A New High · 10-06-2009, 08:12 PM

Most 3.4 headers, JBA for ie, won't work because of the pass side drop, right?

Eat_at_Joes · 10-06-2009, 09:27 PM

The passenger side exit is not ideal no but it will work. some heat shielding may have to be done but just as long as it comes around the t/c to the drivers side it should work. it should be about the same situation as running headers on the 3.0.

You need to take it back to the drivers side to tie back into that header there to make your Y connection and then from there to the first 02 sensor then the cat then so on...

at least that what i understand

chopperbob04 · 10-06-2009, 09:34 PM

Thanks for the info.Have came acrossed some companies that offer long tube headers.just wondered if anybody has ran a set of Thorely's before.

yodathespian87 · 10-07-2009, 08:04 AM

I remember hearing about someone that had them not sure if it ws here or on TTORA. As for other companies I think there is Gibson, and TRD. Though I think TRD are the really expensive ones.

lbhsbz · 10-07-2009, 10:52 AM

I just got the 3.4 into my 86. I'm using the R151 turbo trans w/ the 3.0 M/T bellhousing and the trans moved forward 2 inches from stock.

I've got the Downey headers, and they are very tight. The collectors need to be brought closer together to avoid hitting the frame. The slave cylinder will need a heat shield and the collector wrapped I think, as well as relocating the fuel line and brake lines by the passenger side frame rail at the fire wall.

okie81 · 10-07-2009, 11:21 AM

Quote:

Originally Posted by chopperbob04

Thanks for the info.Have came acrossed some companies that offer long tube headers.just wondered if anybody has ran a set of Thorely's before.

I've ran DT's for a while now and they've been flawless. They're one of the most commonly available headers for the 3.4 nowadays (although there's still other options out there). Stay away from those OBX ones you see on ebay; I haven't heard good things.

10-06-2009, 07:57 AM	#2 (permalink)
yodathespian87 Contributing Member Join Date: Apr 2008 Location: Colorado Springs, Colorado Posts: 464	I heard that ebay has them, other then that check Craigslist. There are a few other brands but haven't seen them used on this site. __________________ 86 Pickup 4x2, Manual (Sold) 87 Extra Cab Pickup 4x4, Manual (Sold) 93 4Runner 4x4, Manual, 3.4 Swap In progress 90 4Runner 4x4, Manual, Blown 3.0 (Stripping out for parts then to become a trail rig/camping/fun truck) 94 Lexus SC400, 1UZ, magnaflow exhaust, after market headlights, bought for parts for the swap into the 90 4Runner

10-06-2009, 08:12 PM	#3 (permalink)
A New High Registered User Join Date: Jul 2008 Location: Gresham, Oregon Posts: 35	Most 3.4 headers, JBA for ie, won't work because of the pass side drop, right? __________________ Tyler 1992 White Runner 3VZ/A340 5VZ/R150(in progress)\|Inchworm 23spl\|MC XD 23spl 4.7's\|D60/14B waiting to go in after winter It's A Jaap Thing

10-06-2009, 09:27 PM	#4 (permalink)
Eat_at_Joes Registered User Join Date: Apr 2009 Location: Green River, Wyoming Posts: 16	The passenger side exit is not ideal no but it will work. some heat shielding may have to be done but just as long as it comes around the t/c to the drivers side it should work. it should be about the same situation as running headers on the 3.0. You need to take it back to the drivers side to tie back into that header there to make your Y connection and then from there to the first 02 sensor then the cat then so on... at least that what i understand __________________ The 3.0 remaining days are limited. muwahahah.... 1993 Yoda p/u 5 spd Custom bumpers, kc lights, warn m8000 winch On the way; 3.4 swap, custom light bar, Toyota e-locker

10-06-2009, 09:34 PM	#5 (permalink)
chopperbob04 Registered User Join Date: Oct 2009 Location: Roseburg OR. Posts: 7	header question for 3.4 swap Thanks for the info.Have came acrossed some companies that offer long tube headers.just wondered if anybody has ran a set of Thorely's before.

10-07-2009, 08:04 AM	#6 (permalink)
yodathespian87 Contributing Member Join Date: Apr 2008 Location: Colorado Springs, Colorado Posts: 464	I remember hearing about someone that had them not sure if it ws here or on TTORA. As for other companies I think there is Gibson, and TRD. Though I think TRD are the really expensive ones. __________________ 86 Pickup 4x2, Manual (Sold) 87 Extra Cab Pickup 4x4, Manual (Sold) 93 4Runner 4x4, Manual, 3.4 Swap In progress 90 4Runner 4x4, Manual, Blown 3.0 (Stripping out for parts then to become a trail rig/camping/fun truck) 94 Lexus SC400, 1UZ, magnaflow exhaust, after market headlights, bought for parts for the swap into the 90 4Runner

10-07-2009, 10:52 AM	#7 (permalink)
lbhsbz Registered User Join Date: Oct 2007 Posts: 36	I just got the 3.4 into my 86. I'm using the R151 turbo trans w/ the 3.0 M/T bellhousing and the trans moved forward 2 inches from stock. I've got the Downey headers, and they are very tight. The collectors need to be brought closer together to avoid hitting the frame. The slave cylinder will need a heat shield and the collector wrapped I think, as well as relocating the fuel line and brake lines by the passenger side frame rail at the fire wall.

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