hi everyone i have a 97 gti 16v , in the next few months i will be doing abit of work on it my plan is a polished TB , modded air box , port & polished head and a remap , what i would like to know is with a P&P head is there anything else needed besides removing the heading and having it done is there any work needed on the pistons ect?
what BHP would i look at gaining from this work