cooler line AN size

[forcefed3.8's]

I am looking to make up a set of lines to go from the trans to the cooler and back. What AN size should I use. I was thinking 6AN. I have a set custom made with quick disconnects that are 4AN that came with a car I bought. Is 4AN enough?

 

[SSedan64]

AN-6 would be better. I've seen AN-8 recommended for use with a TransBrake.
Fittings in Trans case are 1/4" NSPT "straight thread" not NPT tapered pipe thread.

 

[Boost231]

-6 is what i run.

 

[aminga]

-6 Here

 

[TR Custom Parts]

This might help.

http://www.turbobuick.com/forums/transmission-talk/309664-my-new-transcooler-lines-install-pics.html