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Mike Winterboer's primary goals with the Classic Inlines aluminum head were to reduce total ignition timing while improving airflow. He achieved these goals with a high-swirl chamber that yields exceptional quench and fuel distribution. High-velocity intake ports yield improved torque. A fresh approach to exhaust ports means better scavenging. In dyno testing, Winterboer has witnessed outstanding performance across the powerband. Of course, much depends on camshaft and induction selection.