Description

The Boyesen Racing Reed 633 delivers measurable flow improvements across your entire powerband, translating directly to sharper throttle response and stronger acceleration from idle to redline. Laboratory flow analysis confirms that Boyesen’s dual-stage reed design outperforms conventional single-stage designs by permitting greater flow velocity under all operating pressures. If you’re serious about extracting every bit of performance from your engine, upgrading to precision-engineered reeds is one of the highest-ROI modifications available.