I thought several vendors tested the stock mani to about 5psi then it started to swell?
Originally Posted by TaZaM3
The stock S54 manifold is pretty weak also its completetly different then a 330's mani, remember individual throttle bodies etc... I know lots of testing has been done on the stock mani years ago.
I also know Jason from ProEFI tested his turbo application with the stock mani.
Would be good to get some of his feedback.
Good stuff guys.
Active Autowerkes HKS Stage 2 Supercharger