Our billet pressure plate set is far stronger and lighter than the stock set up and provides a positive EZ release and take off. Original tend to vibrate under take off. Our improved design captures the 16 springs and holds them in proper position even under the toughest of takes off in my sidecars. This is a good upgrade. Original steel plates weigh 1.5 lbs (660g) while our billet aluminum weigh in at 10.8 oz (308). Stronger, lighter, smoother, better!!!