I'm looking to buy some cnc stainless header flanges to build a turbo kit on my 2014 GMC 5.3 DI. If anyone knows where I could get both header flanges and a T4 turbo flange, would really appreciate it. Thanks in advance. Post up please.

 

There are a few out there. I had these saved in my favorites for some reason.
There is also a set that is CNCed with a step machined into it so the header tubes fit inside the flange and not flush mounted. I'm trying to find them now.

Cast Header Flanges

found some
http://www.cbrperformanceproducts.co...s1hfss.500.htm

http://www.turbo-flanges.com/product...products_id=36

 

Those are all for ls series motors i called arh and got a set from them man ill get them tomorrow tracking says.

 

I called arh today and they told me they can't sell me flanges who did you talk to

 

Look on ebay. 3/8 flange steel is $40 pair, 1/2 flange is $60 pair. Stainless 3/8 $80 (I think that is a pair) 1/2 $120 pair. I have got numerous flanges off ebay without problems.

 

if your building turbo manifolds, i strongly recommend running 1/2" Mild flanges for both the head and the turbo. They will get a little surface rust but you can always coat just the flange if you're running SS primaries.

SS will warp extremely easy. You'll need a aluminum jig or a spare head to bolt them down while you're welding with either flange.

Acestainless.com, treadstoneperformance.com, atpturbo.com and the turboflanges.com link posted before are good sources.

You can get Vibrant flanges from summit. they have stainless and Mild flanges. reference their website for part numbers at vibrantperformance.com