The D while in the engine code stands for dual overhead camshaft (DOHC). This is completed by fitting an RB25DE or RB26DETT cylinder head and or turbo to a standard RB30E/T block. The RB25DET just isn't ordinarily used. The RB25 crank collar situation is definitely quite common on several RB https://rb26dett-complete-engine25555.link4blogs.com/50392696/not-known-facts-about-rb26dett-complete-engine