OFFICIAL DOUG THORLEY HEADER GROUP BUY!

Here are the PICS:

This is a view of the bottom of the header. That is flange that I couldnt get on... 2 of the bolts are a pain


2 Pics of it all installed from up top

 

Whats the sound difference with just the header on?

 

wow that looks muuuuuuch easier of an install than the v6 long tubes!

 

No my 2 hours was for the V6 LT's. I don't see how it's taking everyone so long. If you use flex head wrenches, you can get all the bolt heads easily. I loosened the Y-pipe first, then removed all the bolts for the supports and removed those. Then loosened and removed all the bolts on the headers. I sent the LT's up from underneath instead of trying to drop them in from the top. Have a friend apply rearward pressure to the Y pipe and both sides slide right in. I started at 2:40pm and was putting tools away at 4:00pm. Also use liquid wrench on all the bolts and let that sit for about 10 minutes. I do a lot of work on vehicles though, I restore old cars as a hobby so bolt on parts are usually pretty quick work.

 

Not much different. It sounds slightly deeper but maybe its just my imagination. I am getting better gas mileage, and seems to have more torque, I find that I am not going from 5th gear to 4th gear as often

 

I had a significant sound difference with the LTH, pipe bomb and TRD CBE and powerstick.....too loud! I removed the pipe bomb and replace with factory, the sound is freakin sweet!

My $.02, if you are going with LTH, keep the Y pipe cats, or cut them out of the old piping and put them in your new pipe...it's a must for the right sound!

I highly recomend the Powerstick with LTH's also...the sound is sweet!

 

what is this powerstick you speak of?

 

anyone dyno test their longtubes yet?

 

+1 on the Dynotest. I'd like to see some actual results if these things actually help. Same with CAIs and aftermarket exhausts. There's gotta be some dyno test results.

 

There is this. If you look you start to make more power than stock at around the 3000 RPM mark both HP and TQ. So far I like my long tubes, but only because I can run the hot APR tune.

 

yea we've seen the fj dyno's, but no one has posted anything with a taco yet for the v6 long tubes

 

would also like a dyno for the 4 cylinder haha

 

so up to 2700 rpm we lost hp?

 

yes, but that's the general rule of thumb of longtubes. Now if you were to get shorties and bypass that with no cats, that might be something of interest to you if you want low end power. Or if you were to custom make your own headers that would also be interesting.

 

so the $1,000,000 question is.....how can we gain back some hp in the lower rpm range?

is there something that we can do to our exhaust after the headers that can gain back some of that difference? maybe to lose some of the >2700 rpm hp gains and move it back down the rpm range?

i'm looking into re-gearing to gain some more torque out of my lower end rpms, but if there's a cheaper way to regain some lower rpm torque and hp i'd be all for it...

 

Intake more air through a supercharger.

 

yea don't really care much about the S/C

re-gearing is the most expensive mod i plan on doing in the future on my truck...already got a good amount of $$ into it

purpose of getting the lower rpm hp and torque back would be for the trails...not often are you hitting the >2700rpms off road unless you are baja'n

 

came across this on doug thorley's website for the long-tubes

http://dougthorleyheaders.com/produ...del/TACOMA 2_SLASH_4WD/sfID1/9/productID/1066
Part Number: THY-515-LS
Product Name: 2005-2012 TACOMA FJ CRUISER PRADO HILUX 4RUNNER 4.0L 2/4WD




this seems much better....so which one is correct?

 

That looks like the new header for the 2nd gen 1gr. This fits both 1st and 2nd engines ( i have them on my truck) but now which engine did the dyno? to me this looks like a 2nd gen dyno.