All our Evolution cams come complete with gear.

HQ-0024 “Rumble Stick”

Bolt-in cam for use with stock springs. With good pipes and ignition we have seen 75 horsepower and 75 foot pounds of torque using stock heads and rejetted carb. Great bottom end and mid-range as well as lots of power on top. This same cam is used in our System 75 kit.

Timing specs measured at .053” tappet lift.

Intake   20/98/36     236   .500” lift                                                                                                              Exhaust  51/106/19   250   .500” lift

HQ-0029 “Rumble Plus”

This cam is for use with ported heads. Pulls progressively harder from idle to 6,000 RPM. Requires the installation of our HQ-2007 or 2008 spring kit. This is the same cam we use in our System 85 kit.

Timing specs measured at .053” tappet lift.

Intake   20/98/36     236   .580” lift                                                                                                              Exhaust  51/106/19   250   .500” lift

HQ-0023 “Thunder Stick”

Originally designed for ported heads using 1.900” or 1.940” intake valves, this is our best selling Evo cam. It has always yielded more torque and horsepower in a 10:1 compression engine than any other cam. Requires our HQ-2007 valve spring kit. We use this same cam in our System 95 kits.

Timing specs measured at .053” tappet lift.

Intake   19/104/47    246  .600” lift                                                                                                             Exhaust  52/104/24   256  .530” lift

HQ-0026 “Thunder Plus”

Hotter version of our HQ-0023 cam. For use with engines that have taken the next step higher in compression ratios.  Requires our HQ-2007 valve spring kit.

Timing specs measured at .053” tappet lift.

Intake   20/106/54    254  .600” lift                                                                                                             Exhaust  53/106/22   256  .530” lift

HQ-0028 “Lightning”

Hotter version of our HQ-0026 cam. We use this one a lot in stroker motors with high compression. Requires our HQ-2007 valve spring kit.

Timing specs measured at .053” tappet lift.

Intake   23/109/63    266  .600” lift                                                                                                             Exhaust  52/105/24   256  .530” lift