Lighter steel single mass flywheel with 228mm clutch surface for direct replacement of the heavy standard 1.8T flywheel. Only for 5 speed gearbox. This Flywheel creates a very quick reving engine and makes it much more agressive and powerfull. Idel speed stays normal. We highly recommend to use the ARP flywheel bolts with this flywheel. IMPORTANT Note: The stock clutch will not work on this flywheel. Another Clutch system is needed as recommended underneath: Manufacturer Information about the manufacturer BAR-TEK BAR-TEK Motorsport GmbH Im Rauschen Auel 3, 51491 Overath-Brombach, Germany info@bar-tek.com