Stock Piston Weight (273/318/340/360)

Stock 'Cast' Piston Weight Measurements

* 273 (2-Barrel).........530 Grams
* 273 'Commando'......569 Grams
* 318......................592 Grams
* 340......................719 Grams
* 360......................584 Grams

* Speed Pro 'Forged' Replacement Piston for a 340 (723 Grams)