header fix !

[turbolou]

Recently I started paying attention to some of the after market header construction & and was not impressed. The passenger side on the one illustrated had a sizeable blockage on two of the pipes that merge together where you cant easily see. That involved using a hole saw cutting two holes in order to to have excess and be able to blend the pipes where they are welded to gather. I discovered the problem using a bore scope.

 

[Royal-T-Ltd]

I noticed that too... I have a set that I bought a while ago and wasn't impressed at all with the merged tubing on the passenger side... I planned to try and use a long carbide bit to grind it down and smooth it out but don't know if that would work.... I was trying to avoid cutting a port to do the work because of my inability to weld.... it really sucks that they look great until you take a better look. I wonder how many people are running them as is and how they compare to the originals and the 'name brand' variation.


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[turbolou]

The ones in question were bought off e-bay that a customer had on his GN that ran poorly.The were T/A knock offs

 

[Royal-T-Ltd]

The ones I have are the SE style / TA style bought from a well known vendor - like mentioned they look nice sitting on the shelf. But I wouldn't install them without cleaning them up.


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[turbolou]

I noticed that too... I have a set that I bought a while ago and wasn't impressed at all with the merged tubing on the passenger side... I planned to try and use a long carbide bit to grind it down and smooth it out but don't know if that would work.... I was trying to avoid cutting a port to do the work because of my inability to weld.... it really sucks that they look great until you take a better look. I wonder how many people are running them as is and how they compare to the originals and the 'name brand' variation.


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If you don't correct the problem the stock ones would have to have more efficient flow .

 

[Chuck Leeper]

Seems this is a common issue.........Such problems have been posted some yrs back.
Cheap crap...

 

[bison]

Properly installing a set of aftermarket manifolds properly is a time consuming process. They sure as heck never fit like stock. I doubt any of them show any power over stock in 99.9% of applications either


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[TurboTnZ06]

Don Cruz had a SS set built (flanges are SS too cuz I lived on the saltwater in FL) for me a few years ago, they are awesome. I got tired of my stockers cracking at the crossover when I overtightened them and generally leaking.