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The 4.9 grind is our best performing mid to long length oval track camshaft, and the largest .620" cam we offer. Expect strong mid range and top end power from RPM ranges of 4700-8500rpm. We recommend our matched Beehive solid roller valve springs for this cam that are 180# closed seat pressure. 

Stage 4.9 Circletrack Race Mechanical Roller Cam .620/.620" 4700-8500rpm

  • Solid roller camshafts require the installation of solid lifters. This camshaft requires are Beehive solid roller valve springs or other springs with 180# closed seat pressure minimum with clearance for .620" valve lift. Machine work is required to the spring pockets and Boport or other .400 or .450" tip valves are required. 

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