Actually from what I’ve heard and seen, the main reason why people wanna go with an RB series engine is:
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To say or tell people that they have a “Skyline” engine in their car
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They want to be ‘Different’ because ‘everyone’ has an SR.
And I can tell you that it is definitely NOT for reliability issues. That’s just pure bullshit. If you spend $8000 on an RB swap, you can have a very reliable KA-T or SR.