Group buy for Doug Thorley PREMIUM VERSION headers, need 20 people!

Fired mine up, long tubes and Y pipe. At idle it may actually be quieter than stock, deep mellow.
Blip the throtlle and it's not the same truck. Very crisp, maybe even a little pissed off sounding.
I did mine as part of a 4wd conversion so I have not driven it yet.

Which gaskets did you purchase for the upstream and downstream ends of the Y-pipe?
 
Question for those that have received their headers: Did everyone get an email w tracking? Back on the road working and I would like to know when they leave Cali.
Thank you and Rock on 2UZs!!
 
Question for those that have received their headers: Did everyone get an email w tracking? Back on the road working and I would like to know when they leave Cali.
Thank you and Rock on 2UZs!!

I had texted Jason, and we discussed that he could just text me tracking whenever he received it. If you get ahold of him via text, he's usually cool with a phone call at that time, and you can get 95% of your questions answered pretty succinctly.
 
I took the old manifolds off today. With a milwaukee impact wrench, extensions and a impact swival, it made it pretty easy. The weird thing is, the old manifolds fell right out without any need to jack up the engine like the instructions stated.

Just curious what size socket did you use? I just got some new studs and lock nits and they look like they are a 15mm or 16mm. I have not had a chance to size them yet. That seems weird because I have done a lot of header installs in my day and can't remember the socket being that big. Usually a 3/8 or 7/16. However, I never installed headers on a Toyota.


HDHP
 
Just curious what size socket did you use? I just got some new studs and lock nits and they look like they are a 15mm or 16mm. I have not had a chance to size them yet. That seems weird because I have done a lot of header installs in my day and can't remember the socket being that big. Usually a 3/8 or 7/16. However, I never installed headers on a Toyota.


HDHP

14 mm and 10 mm 3/8 impact swival socket from Sunex. These are just deep enough. Any deeper in socket and it would probably have trouble with clerance.
 
OK, thanks, guys! That seems more like it. I wonder If the nuts I have are too big? I know my nuts are big but that's not what I am talking about! lol Wondering if a 16mm socket would be too big to the nuts? Prob going to have to use a modified box end wrench?? I will just have to see..
Thanks again, guys!!

HDHP
 
Picked up my headers from FedEx yesterday. They were supposed to be delivered Sunday but since they got pushed back to Monday I re-routed for pick up at my local FedEx. I haven't opened them yet since I'm still waiting on the titanium hardware kit before I figure out when I have time to attempt the install.
 
Can someone please post a pic of the DT Headers installed with picture focusing on the studs & the nuts please and thank you!

Also if you have a pic of the stock headers same Focus area.
I'm at work right now been working too many hours can't get to my 4Runner at this present time hope you all understand thanks for any help!
HDHP
 
Can someone please post a pic of the DT Headers installed with picture focusing on the studs & the nuts please and thank you!

Also if you have a pic of the stock headers same Focus area.
I'm at work right now been working too many hours can't get to my 4Runner at this present time hope you all understand thanks for any help!
HDHP
 
Drove it for the 1st time just now with the long tubes/Y pipe, I already had the Gibson cat back. I'm surprised how quiet it is. under 50mph cruise is as quiet or quieter than stock. Sounds very healthy when you push the loud pedal.
I used the ebay 90 degree CEL eliminators with catalyst at the tip. No CEL's & with them pointed to the rear the wires plugged in perfectly without having to unclip the wires from their brackets.
I did something else that I wasn't sure how it was going to work out, I used a 3/8" NPT tap in the end of the air tubes & screwed in brass plugs. Left the air injection open as I have the electrical bypass. Seems to be fine.
 
Has anyone got any updates on the titanium hardware? I'm getting anxious because that's all I'm waiting for now to complete my installation.
 
Fired mine up, long tubes and Y pipe. At idle it may actually be quieter than stock, deep mellow.
Blip the throtlle and it's not the same truck. Very crisp, maybe even a little pissed off sounding.
I did mine as part of a 4wd conversion so I have not driven it yet.

How does the butt dyno feel? Is it much of a power difference?
 

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