High Boost ARP Studs Cylinder Head Kit for all 1.8T 20V. A MUST for all engines that drive with increased boost pressure! ARP is the market leader in this field. The studs are made of 8740 chromoly steel and have rounded threads. Up to 30% stronger stretch steel than standard bolts. All ARP high performance bolt kits incl. bag Moly Paste. Attention: HIGH BOOST Version for maximum boost and pressure. The thread in the block has to be cut from 10mm to 11mm. Then these studs are 11mm in diameter and can withstand higher forces. Please note the version (engine code). Don't fit to AEB engines Torque in 3 stages with sufficient ARP paste. Last stage 110 Nm. Manufacturer Information about the manufacturer BAR-TEK BAR-TEK Motorsport GmbH Im Rauschen Auel 3, 51491 Overath-Brombach, Germany info@bar-tek.com