for sale is daiyama racing nuts. they are brand new, never fitted on car titanium gold finish. they are 12x1.25, so fit our car. i have 5 sets= 20 nuts very light, only 25g each! so 20x25=500g only! normal nut is about 60g each, so 20x60=1200g! on the package it claims "50% harder, 33.6% stronger, 62% lighter" $115 to your door!!!