These have a flange diameter of 13mm. I would suspect they are made of ss. I had a set of bolt powdercoated red and they came out looking like anodized aluminum red.
__________________
2017 370Z Nismo Tech 6MT
Work | Motordyne | Powertrix | Swift | Michelin | Takeda | Hotchkis | RJM | Voodoo13 | SPL | SPC | Z1 Motorsports | ZSpeed | Morimoto | Craft Square | Hawk Performance | Kanjo Spec.D | Raceseng
|