TwinTurbo.NET: Nissan 300ZX forum - NA and TT upper and lower plenums are identical, the only
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Subject NA and TT upper and lower plenums are identical, the only
     
Posted by LitlElvis on March 12, 2023 at 12:28 PM
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In Reply To Is there any difference between the plenums on the Z32 NA posted by 240Z FeO2 on March 09, 2023 at 12:58 PM
     
Message differences are between Early (90-93NA,90-94TT) and Late (94+NA,95+TT) versions:

Early lower plenum works only on 30P(NA) and 40P(TT) heads

Late lower plenum works only on 10Y(NA) and 48P(TT) heads

Both Early and Late upper plenums will work on Early or Late lower plenums (the ports are all the same size and alignment).

External differences are: Late upper plenums have different bridging for the throttle linkage mounting, a large boss added to #5 runner, and the throttle linkage cover mounts you mentioned.

     
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