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Review on ๐Ÿ”ฅ Maximize Power and Performance with Proform 66917C Hi-Performance Gear Drive by Mark Loebis

Revainrating 4 out of 5

10ยฐ when installed. 0 .

Installed as directed then calibrated the cam to find it at 96ยฐ intake centerline instead of 106. Removed transmission controls from another engine I had in the garage to make sure I didn't lose them. The lower gear is not properly clamped. At the TDC you can see that the timestamp is pointing a few degrees clockwise. Don't save money.

Pros
  • cool product
Cons
  • Clarity