I agree on a stock rb25det it wont last long 2 turbo's meens twice as much cfm ,u gona need a good fuel setup.And by the time u build a manifold ,piping its not going to be cost effective.Also it will spool up later but so will a bigger single turbo.And think about this why do all the big hp cars (supra,gtr,rx7) all run a big single turbo....cause its two hard to get big power out of 2 turbos cause they have to be producing the exact same cfm,And this usally ends up in difficult tunning which is not worth the effort.