ICONIC UPGRADE TIMING CHAIN GUIDE - K20 / K24The Purpose of the ICONIC 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. HPTs timing chain guide ensures that your high dollar K series motor will never jump timing from the crank timing gear in the event of a timing chain tensioner failure. Please note this product sites on top of the original K20a2 oil chain guide , it does not replace it.