Dave Mackie Engineering camshafts are designed using decades of dyno testing, racing, touring, street rodding, and research with cams from all major manufacturers. That knowledge, along with vast experience with cylinder head characteristics, gives unique insight into what each Harley Davidson engine needs to accomplish the goals of our customers. Every goal is different, and every combination of induction, exhaust, ignition, gearing, vehicle/rider weight, altitude etc. is different. We have the knowledge and experience to recommend the “just right” camshaft for you. Our goal is to provide the best performance possible.