CNT LTH vs FI LTH

Originally Posted by Bauran

Other than price what is the difference between these two long tube headers? Specs on both are comparable (I.e. Tube dimensions etc.); does anyone have experience up close to these two items to be able to substantiate the near triple the price of the FI version.

I know FI makes quality products and is a fan favorite here so the intention is not to talk down FI, I just would like to know why so much higher? I only have pictures to go on and tbh in side by side pictures they look almost identical except where they meet up with the cbe.