Engine repair and test tools for hi-performance and race engines, have many similarities to standard tooling, but have increased quality and precision. Improve and maintain performance of your hi-horsepower engine by performing leak-down tests after every race weekend. This allows you to keeps tabs on what is happening inside and determine normal wear or an unplanned rebuild. Same goes for an oil filter cutter. Bearings are cheap, compared to pistons and an overbore. Oil filter cutters are a must have for any serious race engine owner.