That's good news. Thanks for the info. The Rebello people probably know the flange will flex. Hard to imagine they wouldn't, or would put out a product with a critical area out of spec., with all of their experience. I guess it could happen though.

Now you have to make one of those videos. No flip-flops, wear some good shoes, with socks.

Isn't the exhaust isolated, weight-wise, on a turbo car? We can argue this point endlessy, my point is that if you remove part of the structure,the integrity of that structure is compromized. Cutting the header up is a fools bet. if you are going for one race, thats one thing. If you are trying to put a header on a street car, or a daily driver, you are asking for trouble by cutting up the header flange. It's bad advice, and a stupid way to fix a problem that was created by the welder that bent the metal while fusing the parts in the first place. I'd like to see you take a Saws-all to a $300 part to solve a 1/4 inch fitement issue.

I'm not looking to throw you under a bus, just saying that this is not the sort of problem that requires a torch and saw.

It is not bad advice.It is an option.Your statement that the "structure is compromised" shows your lack of experience and utter lack of understanding how things work.

Eagle,Hedman,Thorley and others have used the split flange design since the 60's.This is not a hack approach,it is not borne of desperation,it is common manufacturing technique.

The OP needs to make the decision how much time & $$.I personally don't like the way they look based just on the appearance of the "head side of the flange".

It is not bad advice.It is an option.Your statement that the "structure is compromised" shows your lack of experience and utter lack of understanding how things work.

Gee, I'd have to say that if one cut something in half that it's structure might be compromised just a little. But maybe that's just crazy talk.

Steve

Gee, I'd have to say that if one cut something in half that it's structure might be compromised just a little. But maybe that's just crazy talk.

Steve

SInce i just got done listing all the makers that don't use "solid" flanges-why would you say that?

Steve-glad it sealed for you.

SInce i just got done listing all the makers that don't use "solid" flanges-why would you say that?

Steve-glad it sealed for you.

I think the obvious conclusion is that if one cuts up an existing structure it's integrity is compromised. Will it still work. Maybe, but that's not the point.

5thhorsemann said....

"the integrity of that structure is compromized"

His statement, for all intents and purposes, is true.

Steve

Bought the same header with the same warpage, bolted down fine-No Leaks so far with over 3000 miles. Just start from the center and work your way out slowly and it should lay down fine. Checked the torque later on and nothing came loose.

His statement, for all intents and purposes, is true.

Steve

In order for it to be true,EVERY single header on the planet would have to be made with a solid(continuous)flange.THis is simply not true.

Edited December 7, 201014 yr by Z train

In order for it to be true,EVERY single header on the planet would have to be made with a solid(continuous)flange.THis is simply not true.

If cut the flange would be structurally compromised. That's a fact. As a matter of fact it's pretty much the definition of structurally compromised. Why can't you admit that?

If cut it can no longer perform the function of controlling port and bolt hole spacing between cylinders. So not only is it structurally compromised but also functionally compromised. That's a fact.

This header was not designed or manufactured with a split flange. Fact.

How all the other headers in the world are made is irrelevant to the structural integrity of this header.

Steve

Edited December 7, 201014 yr by doradox

Ok boys:) You both make good points. Someone asked about brands and the one I just put on Taylors car is the MSA 6 into 1. Gap looked very similar. I found the same conclusion. It did not take much torque at all for it to "suck" down. Not too many miles yet, maybe 100 so time will tell. After wrenching for 30+ yrs. I would say it is a crapshoot. Almost all headers I have dealt with usually have some issues requiring re-torquing periodically. I have found that if you re torque when hot every so often you can go for many miles/ years on a set of gaskets. Also the flange on these is thicker than most I have dealt with so that should help.

If you can I'd consider sending them back, but I would call the manufacture first. They might take care of you.

I agree, send it back.

If cut the flange would be structurally compromised. That's a fact. As a matter of fact it's pretty much the definition of structurally compromised. 1)Why can't you admit that?

2)If cut it can no longer perform the function of controlling port and bolt hole spacing between cylinders. So not only is it structurally compromised but also functionally compromised. That's a fact.

3)This header was not designed or manufactured with a split flange. Fact.

4)How all the other headers in the world are made is irrelevant to the structural integrity of this header.

Steve

1)Because then i'd be wrong-and i'm not.

2)In your world,it's a fact.But here on earth-it isn't.

3)Catagorically false.As long as there is proper port alignment,whether the flange is solid or cut is completely 100% irrelevant.

4)On the contrary.

Steve I'd agree if this was a structural part with your argument, however it is not. I think the main reason they make it in one piece is for production reasons. it is easier to make everything line up when welding when it is one piece sense they need to be in a line. The original part this replace isn't one piece and the mounts are designed to be that way. I'd be concerned about cutting it otherwise. Also the cuts would need to be in the correct spot otherwise you would be correct also and it would weaken the mount. In other-wards the part is structural over engineered