>>>"There is absolutely no need for stainless brake lines..."
As a flat unqualified statement, based on my experience I'd have to disagree with that. The term "need" could be debated, but they do provide a positive change in operating characteristics. After replacing the OEM "rubber" line sections on my CRX with SS braided lines, the increase in pedal firmness was absolutely discernible. It went from being what I would now describe as a typical/normal firm pedal, to being absolutely rock-hard. I had considered that the flex associated with the OEM lines would be negligible, and was actually surprised to find that wasn't the case. I only tried them because that was a case where I decided to push aside my own gut feel and go with what the pros said, and they were right. As with some other things, the lack of firmness with the original setup wasn't really apparent to me until after I experienced the change. No, the stock lines were not "old". The value? In theory is should allow more accurate modulation of brake pressure under heavy braking conditions. I know there are failure modes, as with anything else, but given quality construction and proper installation, I don't mind placing some confidence in teflon tubing and stainless as far as materials are concerned. Although I lack the detailed knowledge to attest to the quality of the lines I used, I have some confidence based on experience with the supplier; in this case King Motorsports.
I also run DOT 5 silicone-based brake fluid in that car (per Jackson Racing recommendations), which is another thing that I realize is somewhat controversial, but which has served me well over time.
Disclaimer: I don't recommend the use of either of those products in any car.
I will also add that the braking system of my NSX is showroom stock.
- Richard