Reduce rotational weight with Pettit's new Titanium Flywheel Nut, suitable for all 13B engines. Made with with aerospace-grade titanium and finished with high quality threading, unlike some rival options which have inferior threads. Poor quality threading can damage the eccentric shaft..................

The weight is reduced by almost two thirds compared to the OEM nut.

Great as an upgrade for an engine build or to add to a Lightweight Flywheel purchase, or when changing your clutch.