This engine was tested in 2005 in a sportsman car, results were very positive, this engine is designed to allow sportsman and modified drivers to compete with High Cost 358's. This engine is intended to produce maximum power at approximately 7500 rpm's. The engines cubic inch has increased torque over 358's. This is a combination that has been developed to compete with CVRA & DIRT 358's, not a combination that is designed to fit many different sanctioning bodies throughout the US.