MAX-BOOST is a reduction pulley system used to rotate your blower at higher RPM's creating additional pressure and of course - more POWER. A retune of your vehicle should be considered mandatory. Higher boost levels in turn place increased load on internal engine components, thus we recommend these be installed on only upgraded bottom ends. No warranty outside of product workmanship is expressed or implied. Single kit includes your choice of pullies, hub, stainless M6 mounting hardware, correct pink Anaerobic sealant, correct Supercharger Oil (both for snout reinstall) and snout machining service. Instructions for ordering: Place order online and we will spend you address information where to send the supercharger snout to have stock pulley taken off and the snout machine with the installed hub and pulley.