[Henry Schmidt]

Here we go again. There are far more considerations to hardware choices than longevity.
In the case of air-cooled 911 head studs there is clamping force, torque consistency, ease of assembly and even spark plug connector clearance in twin plug application.
In every one of these categories, Supertec head studs, nuts & washers out performs the stock steel head studs and relating hardware, offered by Porsche.

How long will you live? That's a pretty stupid consideration given that these cool old collectables often get handed down for generations. I have some customers who are restoring Porsches that were in the family when their grandparents got engaged.

I had one customer who drove his 911 SC almost 120 miles ea way for work and drove it as an everyday car over 75,000 a year. His first overhaul happened around 125K. Broken head studs, a broken valve spring a worn out guides.She was smoking like a chimney. His first Supertec freshen up happened after 250 thousand miles. He drove another 230 thousand miles for the last overhaul. Same head studs but of course all new bearings and other normal wear part were replaced. His 911 warrior is now retired to a weekend driver having been replaced by an Audi TT RS. Cool little car as well.

"Build it right the first time and enjoy your Porsche for a lifetime."