GM 5.0L/305, 5.7L/350 with Borg Warner Velvet Drive and Hurth 450D/ZF45D transmissions with 26 splines (Manufactured by Sach's). Standard plate recommended for direct drive ski boats. Heavily weighted boats should consider Item #12815. This triangular shape replaces round style damper plates with no problems.
GM Small Block with ZF Hurth Transmissions (Heavy duty). This damper raises the mounting bolts heads about 1/4" and Indmar bellhousings may have to be ground slightly for clearance. Hurth V-drive only, not for ZF45 (HSW 450 D) use Item # 1516.