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geting them coated burns off in a few hundred miles, waste of money in my opinion unless you are tuning an ignition system.


Well.... My first pistons were coated on the skirts. I pulled them at 14,000 miles to swap out the Total oil leak rings and the coatings were still good... Super polished at the thrust face and still working.

The best thing was no scuffing.. very good insurance during break in.

The second set of pistons I has coated on the skirts and the tops. Not sure if the ceramic on the tops really helps but it is still there after two years...

My experiance is that the skirt coatings work very well. The ceramic top coating? No proof it really helps but it has not come off.

Higher silicon forging alloys are common and allow tighter clearances but still expand more than a hyperutetcic casting alloy.

Kevin