here is the advertised info. and I have both sets of pins.
Pistal Racing High Compression Piston Set
Direct replacement, drop-in Pistons. These high compression precision engineered forged pistons are manufactured to the highest standards using cutting-edge technology, and have achieved success at world championship winning level. Designed to increase compression and overall performance, they offer significant performance gains over OE pistons. They are 13.5:1 plus, stock claim is 12.5:1, also over 50 grams lighter and stronger double bridged forging. Comes with two sets of wrist pins for "drop-in" or crank lightening. I can express mail or UPS your choice. You pay shipping.