Description:

Stage 1: single-cam motor. Good midrange and top-end. Uses stock auto-decompression mechanism. Uses stock valve springs and rockers.

Stage 2: single-cam motor. Excellent top-end and great over rev. Uses stock auto-decompression mechanism. Uses stock valve springs and rockers.

Stage 3: Single cam engine. Drastically improves top-end with over rev. Uses stock auto-decompression mechanism. Uses stock valve springs.