'Performance steel' steel clutch drive plate set

Steel drive plate set only. This 'Performance Steel' drive plate set is identical to the Alto 'Kolene-steel' drive plates, with the salt bath heat treated nitriding hardening process. But these Performance Steel plates are polished to achieve a lower RA controlled value surface, a smoother surface basically. This microscopically smoother surface reduces hot-spotting which helps reduce heat built-up and the occurrence of plate warpage.