Custom header build for the TrailBlazer

[Chevycrew]

Here is what Im up to now...

I had these cut out by Carl (I Lean) and this will be the beginning of my I6 header for the Atlas 4.2L engine.


I originally was just going to bend up some tubing for the primaries, but I ended up ordering a header "kit" from summitracing.

Parts on order:

http://www.summitracing.com/parts/sum-670185/media/images

http://www.amazon.com/Dorman-03413B-Exhaust-Manifold-Hardware/dp/B0089T068U

http://www.amazon.com/gp/product/B00029JK32/ref=oh_details_o02_s00_i00

http://www.amazon.com/gp/product/B000CPJLH6/ref=oh_details_o02_s01_i00

 

[Greg]

Fun!! Looking forward to seeing this come together! Is the stock manifold restrictive? I know the Gen III V8's have exhaust manifolds that aren't that bad, in terms of flow & performance.

 

[ChestonScout]

Im excited for this to!


One of these days I will be building headers for the 460 in my mustang.









Altho......I think you should be working on a IH

 

[Chevycrew]

Fun!! Looking forward to seeing this come together! Is the stock manifold restrictive? I know the Gen III V8's have exhaust manifolds that aren't that bad, in terms of flow & performance.

No they really arent that bad. Kooks recently developed a long tube header they claim gained 20hp with a computer tune. But Im sure most of that was the tune.

I started with an exhaust leak that I thought was a cracked manifold, well it was just loose bolts. My stock manifold is old, and my replacement heavy duty version is thicker wall. So the new one is restrictive.

Kooks is $915 with high flow cat...

 

[Chevycrew]

 

[Chevycrew]

Im excited for this to!


One of these days I will be building headers for the 460 in my mustang.


Altho......I think you should be working on a IH

lol, I havent touched that truck. Im just going to drive the TB to Moab this EJS.

 

[Chevycrew]

Just a mock up, some tubes need cut and shortened, while others need cut and rotated. Plus I dont know how it will fit in the engine compartment just yet.

 

[Chevycrew]

And now I need to clean and add some VHT flame proof paint (ceramic coating).

 

[Greg]

Looks pretty good Steve!