text: RB26DE The RB26DE is a naturally aspirated variant of the RB26DETT made specifically for the 1992 Nissan Skyline Autech Version GTS-4 (HNR32) sedan. Mechanically, it is similar to the RB26DETT as it uses the same cylinder head, bore and stroke () and individual intakes as the RB26DETT, minus the usage of a parallel twin-turbo system. The engine and ECU (engine control unit) were tuned by Autech and S&S Engineering to make  at 6,800rpm and  at 5,200rpm. It also has a higher compression ratio than the RB26DETT, at 10.5:1.
  RB26DETT
  The RB26DETT engine is a  twin-turbo inline-six engine manufactured by Nissan, for use in the 1989-2002 Nissan Skyline GT-R. The RB26DETT engine block is made from cast iron, while the cylinder head is made from aluminium alloy, which contains DOHC 4 valves per cylinder (24 valves in total) setup. The intake of the RB26DETT varies from other RB-series motors in that it has six individual (3 sets of 2 throttle assemblies that are siamesed together) instead of a single throttle body. The engine also uses a parallel twin-turbo system, using a pair of T25-type ceramic turbochargers set by the wastegates to limit boost pressure to , although the Skyline GT-R has a built in boost restrictor to keep boost under .