https://ibb.co/g4WJnRm original oem parts 13 gram!
DT 300I 15.4 or .5 gm .. I know this because I weighed them!
350i 13.0 gm .. I will wait for Ruffus' confirmation!
You are entirely encouraged to experiment all you want because that is the nature of hot-rodding in most of England, USA and Australia to name three. Cosworth of England to name just one, the great Cosworth-Ford soup-ups that went into the Lotus-America thing I drove ONCE in about '63 and scared the ***P outta me! USA full of hot-rodders like Edelbrock, Hedmann, Mickey Thompson, Iskenderian who are a few who made business of manufacturing "speed goodies" for us greasers to spend money!
Burt Munroe from either Australia or New Zealand, the reclusive genius who cast his own pistons by carefully sculpting the female form in the ground near his shop!
You may be next!