The Patented SD Performance Mega Brace lifter bore reinforcement system is by far the strongest lifter bore brace on the market today. With over 1000 braces sold with no reported problems, it's no wonder more and more engine builders like Butler Performance, Pacific Performance Racing, Ken's Speed and Machine, Spotts Performance, and others are selling and using the Mega Brace in engines they build. It's simple to install and will allow you the option of running todays big hp aggressive roller cams without the fear of lifter bore failure.