Mega-Sphere™ Squish Head and Piston Design
Dave Mackie Engineering provides its revolutionary Mega-Sphere™ Head and Piston design for both Evolution and Twin-Cam motors. Take your pick:
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Some parts and services may not be legal on 1978 and later emission-controlled vehicles. Check your local, state and federal laws.*
*Dave Mackie Engineering high-performance headwork and camshafts are not legal in the state of California for use on 1978 and later emission-controlled vehicles.