I've used and still do use them. The last one in my car was mismarked. The dot on the cam gear was off by 1 tooth exactly. lesson to be learned to always degree in the cam. I have also split the lower gear in half, probaly due to engine misfiring when the cam sensor ring cam loose. Gear split, cam jumped time, and bent 6 custom length stage II titanium exhaust valves trying to start the car. Not the gears fault, but mismarking the gear bothers me. Not to mention spending days degreeing the cam over and over because I could not believe it was the 12 degrees or so off.
Greg Kring
Arlington, Texas
9.05@150