HPT K series Timing Chain Guide. Made from 6061 Aluminum Alloy. CNC precision machined. The purpose of HPTautosport's lower timing chain bracket/guide is to secure the timing chain while the tension is released during the process of swapping cams or doing other head work. HPT's timing chain guide ensures your K-series engine will never jump timing from the crank timing gear in the event of a timing chain tensioner failure. Supplied complete with bolts. Compatible with all K20 and k24 engine variations.