Try to look for the thread locker ring round the bolt. This lets you know it’s underneath the bolt head, at the same time and will assist in retaining them set up is a robust engine, powering over 3 generations from the Skyline GT-R. The famous RB26DETT is respected around https://buyrb26dettengine36109.verybigblog.com/27917348/rb26-engine-for-sale-an-overview