I know this probably doesn't help you now, but every conversation with Z1 I've ever had regarding the banjo bolts ended with them saying they are a pain in the a$$ and just another potential leak point. They even recommended I buy the less expensive, non-premium SS brakes lines for my Akebonos because the banjo bolts are removed entirely.
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2011 370Z 6MT Sport Gun Metallic | ARC | CJM | Ecutek | FI | Fujimura | R2C | SPL | Stillen | TWM | Z1 | ZSpeed | |