Thanks for doing this video, I need to do this job on my 4Runner with the 4.7 but my truck was in the Northeast for a while and I know I'm going to break some of those manifold bolts.
It should be noted that the LX/LC shown in this video has had AHC removed. There is even less room if you have factory AHC system in place. Thank you for the video!
I stumbled on your channel when I was researching LC100/LX470's. Great videos, very thorough. Thanks for posting. I have a couple of questions if you don't mind. I'm in Canada and we only have access to the Lexus line of vehicles and am looking at buying a LX470 or LX570 to set up for overlanding and to pull a 17-20 foot travel trailer. Questions about this video; 1. Does a person need to replace any heat shields or be concerned about excess header heat when headers are put on? 2. Are these or any headers worth putting on with respect to long term reliability and performance increase? On your AHC delete video; 1. I'm having a lot of problems finding a good used LX470 up here and was considering a LX570 but was told the AHC on them can be very difficult to remove inorder to put on a lift and problematic if you're running heavy loads which is what I'll be doing, I would appreciate your thoughts on this. Thanks in advance. Jesse
We usually use the headers as replacement for cracked stock manifolds. I don't know that there's enough power increase that It'd be worthwhile to use them to replace functional manifolds. You loose the heat shields with headers but I haven't seen any ill effects. I've yet to do a 570 suspension so I'm no help there.
why the doug thorley vs stock? Are they louder ? Or is the design better and they are less prone to fail, my manifolds are very rusty but not sure if they leak on my 2005 with 300,000 miles , Any way to test ? Thanks for all your vids!!!
Some people want Thorleys. They haven't been around long enough to see if they hold up as long as the stock ones. You'll hear the manifolds leaking at cold start. It'll be a loud ticking.
I've used both with no issue. The thorley one looks to be remflex which is likely better at sealing gaps. They're fragile until heat cycled though. Thorley originally came without gaskets then switched to these. I'm guessing it was to solve an issue so we've been using them.
I used oem toyota for the passenger side but now after watching this I'm gonna use the remflex which came with the dt headers on the driver side. Thank you for the advice.
It can cause your air fuel sensors to read incorrectly depending on how cracked the manifold is. And it's leaking exhaust in front of the vehicle so it could be getting in the cab.
