How Many Different Cast Iron Twin Turbo Manifolds Have Nissan Used?

[Chris Wilson]

Apart from the stock, common or garden cast iron twin turbo manifolds, what other ones have Nissan produced? I believe that the N1 engine may have used different, freer flowing cast manifolds, but what did the Group A cars (Gibson Motorsport, for example) use? Were they limited to production cast manifolds? Did they "interpret" the rules broadly and have one offs cast with better flow, or did they port stock parts? Just curious as to what the ultimate cast manifolds are for the TT set up. Many thanks.

[Duncan]

pretty sure they are all the same. certainly 32 standard and 32 n1 are the same

[Duncan]

oh and I mean standard externally. the standard manifolds react very well to internal porting - for instance giant uses ported standard manifolds on his 9 sec drag car (it also goes ok around corners)

[daisu]

Twin turbo manifolds on the VG30DETT, though they have different flange pattern