Hey fellas,
Im building a ld9.t and im planning going over 16psi of boost. 
Whats the max boost that this stock intake mani could hold?
Do you guys recomend to change anything from the head? Its currently virgin..  
Block its already forged
Thanks
 
really no limit on the stock intake manifold.
FU Tuning
 
 
agree with John, I've never heard of anyone blowing out the stock manifold.........  although at a certain point its got to become a HP restriction. 
SPD RCR Z - 
'02 Z24  420whp 
SLO GOAT  - 
'04 GTO 305whp 
W41 BOI - 
'78 Buick Opel Isuzu W41 Swap
 
 
Thanks guys for  the info.  I decided to swap to the HO mani instead :p