x-grip vs. z-grip
#3
X and Z
http://fasttoys.net/shop/product_inf...oducts_id=1577
The Z grip will have a harsher engagement but will hold more power. It is recommended for forced induction applications:
http://fasttoys.net/shop/product_inf...oducts_id=1576
Both are 979.00 shipped in the continental U.S