Trailblazer manifolds and how they fit a 3rd gen.
 

Pick up some trailblazer V8 manifolds on the cheap at the pick n pull the other day. They actually fit pretty well, maybe not quite as good as the 4th gen manifolds but they are useable. I like them better than the 4th gen because they don't have any O2 ports, EGR ports or bosses and are a better looking manifold.

here's some pics.

driver side
http://img.photobucket.com/albums/v2...pseb59e8f0.jpg

http://img.photobucket.com/albums/v2...ps95e78725.jpg

this tab that the heat shield bolts too must be cut off.
http://img.photobucket.com/albums/v2...psffbc0eb8.jpg

you can see the tab a little better in this pic.
http://img.photobucket.com/albums/v2...psa4e786f2.jpg

http://img.photobucket.com/albums/v2...psc8aa5016.jpg



Passenger side
http://img.photobucket.com/albums/v2...ps8855812c.jpg


http://img.photobucket.com/albums/v2...ps4402fd7f.jpg

Re: Trailblazer manifolds and how they fit a 3rd gen.
 

Damn those are almost perfect!

Interesting. I don't believe I've heard of anyone trying them before.

Re: Trailblazer manifolds and how they fit a 3rd gen.
 

wow i wonder how they perform.seem to fit nicely with small modding.

Re: Trailblazer manifolds and how they fit a 3rd gen.
 

The passenger side outlet I.D. Is the same size as the passenger fbody manifold basically 2.25" The driverside trailblazer manifold outlet I.D. is 2.18 vs the fbody's 2.25. The primaries are the same. The overall length seems better on the trailblazer manifolds, so they may help with torque a little more.

Re: Trailblazer manifolds and how they fit a 3rd gen.
 

Well it looks like if you wanted to port out the outlets to 2.5 you could do it with a little room left over. Hell I would lol

Re: Trailblazer manifolds and how they fit a 3rd gen.
 

Did you have to purchase a new Y pipe or did the stock one work?

Re: Trailblazer manifolds and how they fit a 3rd gen.
 

Custom Y pipe is always needed unless you buy pre-fabbed headers with a Y pipe designed for a 3rd gen LS swap.

Re: Trailblazer manifolds and how they fit a 3rd gen.
 

Now it is time to look into trailblazer headers.

Re: Trailblazer manifolds and how they fit a 3rd gen.
 

this is very interesting, thanks for posting it up!

Re: Trailblazer manifolds and how they fit a 3rd gen.
 

How is this a good thing?

Re: Trailblazer manifolds and how they fit a 3rd gen.
 

Egr stuff is very rarely used on swaps, and is a cleaner look to not have it, or fab block-off plates to get rid of it.

No O2 ports allows you to weld in a bung in the pipe just after the manifold, and gives you endless placement options, instead of having to put it where factory intended.

Some swaps are tuned without any O2 sensors at all, although not a common scenario, it would be absolutely perfect for that.

Re: Trailblazer manifolds and how they fit a 3rd gen.
 

Cool with another option/way to go. A good heat paint or maybe some spray on ceramic coating and they will look really good too :-)

Re: Trailblazer manifolds and how they fit a 3rd gen.
 

I'm gonna get some more pics and update this a little better when I get some free time.
The lack of O2 and EGR is great for a carb conversion.
Pacesetter makes a set of 1 3/4 long tubes for a trailblazer, uncoated for sub $300. I have no clue if they'll fit a Camaro or not.