Have you been considering building your E34 / E36 but weren't sure where to start? Unsure of what components to pair for the best possible power and reliability combination? We receive inquiries daily from M50 / M52 / S50 / S52 owners interested in building their engine but unsure where to start. The 5150 AutoSport Complete Engine Build Kit features every component you need to fortify your BMW M50-Family Engine internally and prepare for high power, high boost applications or high compression, all-motor applications. These components are the combination that we have had the most success with and recommend as a result.  Please note that each engine kit requires a consultation before shipping, and one of our engine build advisors will contact you regarding your piston configuration, compression ratio, etc. before shipment. This kit includes:  High Performance Valve Spring Kit High Performance Intake Valves High Performance Exhaust Valves High Performance Valve Locks CAT Cams Camshafts OR 5150 Turbo Camshafts ARP 625+ Custom Age Head Stud Kit Athena-SCE Cut Ring Head Gasket CP-Carrillo x 5150 AutoSport Pro-Xtreme Pistons HD Wrist Pins  CP-Carrillo x 5150 AutoSport Pro-Xtreme Connecting Rods Calico Coated 5150 AutoSport High Performance Rod Bearings Calico Coated 5150 AutoSport High Performance Main Bearings ARP Main Stud Kit