well i'll be turbo'ing a y8 pretty soon after the break in and was wondering how much power can the stock head hold. The bottom end will be fully built to handle high boost but im curious to know if the stock y8 head could handle at least 25 psi. Does anyone know somebody running 300+hp with stock y8 head cause my goals is at least 300hp.

 

no idea?

 

I think it's been done but id do springs and retainers ... just as a safety procaution.

 

yea, especially when it's cheap...