If you're not tuning the ******** off it then it wont be beneficial.
Some have reported their cars feeling flat following a large port head with no tuning for it.
Its only a mod for bigger blowers moving greater volumes of air.
Bottom line, try and get any other small port head. Avoid AGU and AEB codes. Don't be stung for BAM tax either.
You will need to:
swap VVT onto non-vvt heads
swap cams on non-turbo heads
swap valve spring shims on non-ko4 heads
swap Cam position sensor on some heads (unsure which sorry, this is easy to visually identify tho)
swap Cam sprocket on longitudinal heads.
Block SAI on early sai heads.
Consult with the forum if you're unsure of anything once you get hold of one.
