will this affect (or effect not sure sory) the fitting of say one of the bolton turbo kits, i want to get teh stage 0 then upgrade to stage1 zpi turbo kit, but i want to do these engine internal upgrades 1st..... or should i just get teh turbo kit?

 

no it will not, but you're gonna have to remap your A/F.

 

I go with the pnp and internals with the stage 0, that's a great building block.