3.4L swap headers
#2
One of the first places I researched before starting my 3.4 swap was the ORS Technical Articles. Click here: http://www.offroadsolutions.com/technicalarticles.htm
Quote from ORS
Quote from ORS
If performance exhaust is desired, we recommend using the Downey header system with a custom built exhaust system. When using the Downey system, exhaust will need to be routed down both sides of the bell housing to a custom crossover pipe underneath the vehicle. Earlier Toyotas were designed to have the exhaust routed down the driver side of the vehicle. With this header setup care must be taken when routing the exhaust down the passenger side to be clear of fuel lines, brake lines, and the front drive shaft (and don't forget the fuel tank too).
#6
I know I'm a day late & a dollar short on this, but I used the Downeys, with a bit of massaging. I also made a Y-pipe with ball flanges to mate to it. Here's a few mock-up shots:
PS- I just helped a friend swap in his 3.4 with Edelbrock headers (for a 2K Taco)- we had to make a longer crossover/downpipe, but they fit nicely. I'll try to get some pics up.

PS- I just helped a friend swap in his 3.4 with Edelbrock headers (for a 2K Taco)- we had to make a longer crossover/downpipe, but they fit nicely. I'll try to get some pics up.

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Seattle_Sign_Guy
95.5-2004 Tacomas & 96-2002 4Runners
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Jul 12, 2015 12:38 PM




