TRD Header for my 85 4Runner??? (1 Viewer)

[msahr]

I have a cracked exhaust manifold on my 85 4Runner, and came across a great deal on a NEW TRD header. ($250 ) Is this a good one? It's a 4-into-1 design which is allegedly better than a Tri-Y, anyone have experience with these? Do I HAVE to re-cam it to make this header work? Yes it has a 02 sensor bung already welded in place...

 

[pappy]

I have a cracked exhaust manifold on my 85 4Runner, and came across a great deal on a NEW TRD header. ($250 ) Is this a good one? It's a 4-into-1 design which is allegedly better than a Tri-Y, anyone have experience with these? Do I HAVE to re-cam it to make this header work? Yes it has a 02 sensor bung already welded in place...

Well, I don't agree that a 4-1 is better than a tri-y. But then again, I've only run tri-y

I don't think you need to recam, but it can't hurt. When I dropped in my new DOA motor I used the stock exhaust. A few months later I installed my Thorley into a 2.25" exhaust and the motor really came alive.

My other comment is about the Ox sensor. I ran the sensor off the header and started having problems with passing smog. So I took the truck to a muffler shop and had them install a bung between the header and the cat. I then installed a three wire heated sensor. My emissions went from sky hi to the lowerest I've ever seen in owning the truck 15 years.

 

[msahr]

The sensor bung is in the pipe TRD supplies, it's upstream of the CAT and in "about" the same place as stock...

I'll let ya know...

 

[pappy]

The sensor bung is in the pipe TRD supplies, it's upstream of the CAT and in "about" the same place as stock...

I'll let ya know...

I seem to recall that now you say it. As long as it reads all four cylinders it will be good. Consider getting a heated sensor. At idle the exhaust will cool and mess up your readings.