Quote Originally Posted by SDGTP99 View Post
Because the ported one was opened up far too much. The tip of the triangle was opened into a square. Take a look; http://www.cardomain.com/ride/3385930/3

I have a newer M90 but it had been sitting collecting dirt & dust. It had to be cleaned & the grease needs to be replenished. I've got some Oil I can get more from GM if I need it. Just need the grease more.

Looks good