This is a hot question,
I know that there will be some debate here, but my amateur's advice is: don't.
The reasons are the following:
- 99% of the time, the rubber lines are more than adequate. I never felt any fade, or lenghtening of the pedal travel on my cars (a 911 Carrera 1976, a 911 Turbo 83, the M5), and I drive really HARD in the Alps, here in Switzerland. The brakes get plenty of use.
- More important is the maintenance problem. You can never see the actual tube under the steel liner. Discerning a small leak from whatever the road throws at the lines is difficult. So a leak or a broken line can be missed.
- These stainless lines are a 1 or 2-year proposition. I don't feel like changing the lines every year. I usually stick to a 3 or 4 year interval.
- this is more anecdotal, but my porsche mechanic has a 800-Hp (that's not a typo) 935 for autocrosses and climbs. In 10 years of racing it, he had one line fail, a stainless line. Now he has standard issue rubber lines on all his racing cars, NEVER a problem. And he wins, more often than not.
I know the subject is a potential battlefield, so these are only my opinions. I welcome any other. The end decision is a personal choice.
Regards, George
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