1st off how much hp do you want? the PSI doesint matter every turbo out there is different and will produce different power find out what you want for power 1st.
2 this will detemine the best choice for which turbo kit youll want to buy.
3 The a3's block and head are good to no more then 300hp on average, it likes to throw rods past the 300hp range *usually* thats the only issue the a3's have.
Also no need to upgrade the stock fuel pump it can flow past 300hp easily,.. make sure you get 1 step coler sparkplugs, kpro and a tune from a local shop, and youll need injectors - 550's will do you plenty and the injectors should come with there kit, and a turbo fast return line, the one provided with both greddy's kit and revhards are crap and will leak oil.
Also since ive been turbo'd ive been running 10-30 synthetic oil.
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