i looked through the where to buy materials sticky and didnt see any. who sells stainless header flanges for b heads? will bmc make them or do they just do mild? if anyone can answer this it might help to add it to the sticky also.


is there a reason other than cost why these are hard to find? is there a reason to not use stainless for the flange if the rest of it is stainless?

thanks.

 

well stainless is bad with heat distortion thats probaly the biggest factor

 

vibrant make them also weirtech can have one made for you

 

x2 for Weirtech, he's got good prices.

 

verociousmotorsports.com thats where we get some of our flanges from..

 

x2. Been there done that. Trust me, it will warp.

 

does it warp from welding it or from the heat from the head/exhaust gas?

 

Both. You can fix a warped flange during the fab process, but it will warp from heat cycling the motor too.

 

so is it generally accepted that ss head flanges are no no then?

 

i've used both for manifolds and as long as you tighten them down after heat cycling on the engine they flatten out.

 

This is where I get mine....spdexhaust.com

 

sent you another pm for a quote. let me know what you can do. thanks

also sent you one for the pontiac 455 flanges

 

so what do most people use for there head flanges. ss or mild?

 

Wier has great prices on mild, on stainless its kinda up there.

SLS has some nice stainless B series flanges.

 

1/2 stainless plate is pricey stuff here in canada dont know about where all you guys live.

 

? for you canada guys im still waiting for weirtech to respond to my pm's for pricing so maybe someone else can give me some insight on this. ive never ordered or had anything shipped from canada, will it take any longer to get here and will the shipping cost more than it would for a similar distance inside the states?

 

sorry for the slow response. pm sent.

 

I've also ordered from spdexhaust.com, they have both mild and stainless Honda flanges.

Good products and prices!

 

no prob. i know what its like to be busy. did you get the pm about the honda and trac bar flanges i need?

 

how thick was it?? 3/8? 1/2?
i cant see 1/2 ss warping when torqued down by 12 bolts, for a honda anyways..

 

It was 1/2 SS316.

Took a LONG time to cut on the mill too. lol

It bacame a piece of scrap metal in the end....

 

I got one from SLS but i did not know they were stainless! LOL. If it is, I welded up my manifold and I did not warp.

 

hmm, how was it welded? was it milled after u welded it? did u do little sections at a time?

im kinda concerned cuz i Spent a LONG time cutting it AND milling it also... 1.5 is allot of material

 

From runner to flange it was welded in about 3/4 to 1" sections and then I moved on to another runner.

It was not milled afterwards, but I tired to correct the warp by putting it on a cylinder head resurfacing machine. It worked until it heat cycled a bunch of time and only kept getting worse. I used a copper exhaust gasket and that didn't help too much either.

Seriously, it loogs great, but isn't worth the headache.