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)
* 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)