Dorman ls2 intake - parts needed 2004 Z06
 

Thinking about going Dorman to replace the LS6 intake. 2004 Z06. Mild porting to clean things up.

Intake
3 bolt to 4 bolt adapter
MAP relocation kit
Shave rear pillar down to fit


Questions:
Where does the brake booster line go to on the Dorman?
Do the steam lines need to be relocated?

Thanks IA!

Should go to the back like normal.

Steam lines should be normal as well.

Why not just go to an ls2 tb??

Because I believe the power steering reservoir is in the way.

I'm having a hell of a time trying to find a three bolt throttle body adapter to a 90mm intake adapter. Found an MSD one, but the specs indicate that its for a 102 MM intake. Any guidance is appreciated!

Ls6 throttle body to 4 bolt 90 mm intake.

Should not be in the way. Same concept as running a fast 92 or 102 with an ls2 tb.

Answers in bold in quoted text

I used this as a guide

https://www.corvetteforum.com/forums...-find-out.html



Also you have to flip the TB if you get a ls2 tb so you will need a maf extender

Are you talking about this adapter? they are all over the place.

https://www.ebay.com/itm/LS1-LS2-LS6...9ZSUrp&vxp=mtr

Gotcha. Thanks, guys.

Also, that wording for the adapter is confusing. Should be something like, "LS6 throttle body to four bolt intake adapter".

It does...But again why would you put this on and not use a ls2 TB? That's where the most gains are going to be

Allows any 3 bolts (LS1/LS6) LS intake manifold to fit 4 bolts (LS2 / LS3 / LS7 / L92 / L99 / L76)


-Direct bolt
-Allow to use with any LS 3 bolt intake manifold to any LS 4 bolts intake manifold
-Made from high quality T-6 aluminum
-Including gasket and bolts
-Improve throttle responds
-Instant power gain

Ok. LS2 tb it is.

Silver blade or gold blade?

Silver blade, OE 12570790, which was also used on some of the early LS7's.

I'm getting ready to tackle this project too. So post up your progress.

What he said...Don't forget you need the ls1 to ls2 tb adapter. Caspers electronics sells it.

How much larger is the OD of the 90mm TB? I've got a BBK 80mm TB now. Just curious what I may need to do differently with my intake tube.

I put a Dorman intake on my 2000 LS1 a few months ago , for now I'm using the stock throttle body but I bought a really nice 3 to 4 bolt adapter from ICT Billet for a very reasonable price , comes with everything , bolts & o-rings , they also have all the wiring pigtails & adapters , I've bought several other things from them since , everything very high quality , great prices ! I had no luck with putting the stock steam crossover under the Dorman , even with their "buttonhead" bolts supplied, felt like it was holding the manifold up to high to me , didn't even try tightening it , I ended up getting a very nice braided nylon 4an Trick Flow (brand) setup I bought from Summit , search for "LS steam crossover" they have several different ones , ICT Billet does also. I also installed a Texas Speed 224 R Cam , CAI , 25% underdrive pulley 1 7/8 longtubes , 3"catless X-pipe Z06 titanium axleback , Texas Speed mail order tune. This Car RIPS ! Taking it in for a fine tune on the Dyno soon , I'll put the results up when I get them.

This Dorman intake was a last second decision for me. My plan was to run the GM truck rear coolant crossover, but test fitting last night, the Dorman intake hits the crossover. Not sure if i'll be able to bend the crossover any. Otherwise I may be going with the Trickflow steam vent kit. I had wanted it initially but the truck crossover is much more economical.

So.... sounds like a steam pipe kit is needed. Yes?

I can't recall what I did but may have done the delete thing since i live out here in the desert. I'll take a pic tommorow

My 2001 doesn't have the rear steam vents but I was adding them. For folks with the LS1 style factory 4 corner vent lines, they seem to have mixed results smashing them down... which also seems like they would be less effective. So my guess would be that if you want a guaranteed solution, something like the Trickflow kit would be pretty good.

It may be a week or more before I'm back in the garage, but if I can tweak the GM truck crossover to work with the Dorman, I'll post up.

I don't like crushing the early style 4 port system, it cuts flow and the FAST intakes have been known to crack the lower shell which Dorman uses in their intake if forum topics are correct.

Bill Curley has posted where he ran the 01+ front on the rear, others have used a truck front cross over on the rear. Google image search is a good place to start.

Will this work?
https://www.summitracing.com/parts/nal-12602548?seid=srese1&cm_mmc=pla-google-_-shopping-_-srese1-_-chevrolet-performance&gclid=EAIaIQobChMIr8P18tzc2Q IVlZN-Ch0c7gNREAQYAyABEgIRwfD_BwE

Or just get another front crossover?
https://cimg0.ibsrv.net/gimg/www.cor...baa3ef16b8.jpg

I found GM 12605716. Looking for the front truck crossover.