The auxiliary shafts on the EA888 engine ensure low-vibration, smooth and balanced engine running. We recommend to use this repair kit with every revision! At the latest when the block is honed again, the shafts should be replaced to avoid damage from abrasion during drilling and honing. Our repair kit also contains the two screws and the guide sleeve. Manufacturer Information about the manufacturer BAR-TEK BAR-TEK Motorsport GmbH Im Rauschen Auel 3, 51491 Overath-Brombach, Germany info@bar-tek.com