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420A using a 4g63 turbo clutch line for 420a

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Does it not thread together? I wouldn't be too concerned about the actual flow diameter, as long as it threads together and secures you really won't notice a difference.

If it doesn't thread together and the problem is that the fittings threads are too large for the line, you will probably need a -3an fitting with the double flare side the same as the first piece you ordered. I just need clarification on what part "isn't fitting".

This is why I recommended measuring and checking sizes before ordering anything.
The thread size is correct and the inverted flare fits in the line, but the male flare is to large to even fit in the end of the line. I think if I get one with a smaller flow diameter it will fix that problem.
 
.Edit- if the one you have threads on to both the master and slave equally and fully, it should be: inverted flare m10x1.00 to -4an, like THIS.

*You may want to verify if your clutch line is 3 or 4an, and you'll still want to verify the thread pitch/size on the slaves inverted flare. But that should get you close.

Why I posted this.

The thread size is correct and the inverted flare fits in the line, but the male flare is to large to even fit in the end of the line. I think if I get one with a smaller flow diameter it will fix that problem.

IF I'm interpreting what you say correctly, the THIS should be the part you need, but please VERIFY what size line you have before ordering. Message the seller or whatever you need to do.
 
The threads are correct. The reason I said something about the flow diameter is because the inverted flare fits and threads in, but the male flare is to big to even fit in the end of the line. The threads are right but because of the size of the flow diameter the male flare is bigger than the hole its supposed to fit into. It wont thread into the line because the actual size of the flare is too big. So I was thinking if the flow diameter was smaller than the male flare wouldn't be as big. Am I right about this? I couldn't find any sizes or anything. I went on ebay and looked at the line I got and there's nothing.
 
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