I have ordered IHI VF34 turbo for my 1.8t. Im looking at running 350hp. Can anyone suggest other manditory upgrades needed to accomodate this power gain? (exhaust manifold, rods) Got a tuner to do the re-mapping so injectors and fuel pressure regulator will all be upgraded.

(I already have Front Mount Intercooler)
(I have STANDARD exhaust, upgrade?)

Thanks

thats a horrible idea
read this : https://www.audiforums.com/m_816714/tm.htm

i think depending on year you will need to change rods, anythin over 300 hp for a b5 and i think b6 will need stronger rods, you'll need exhaust manifold, HFC/TP, TIP, not sure about a larger MAF but it can't hurt, 2.5-3" exhaust, stage 3 clutch, dv, the list is sometimes endless here is a good read:
https://www.audiforums.com/m_816714/tm.htm
The newbie guide to BT

And just search the forums....

good luck finding a manifold to fit that IHI turbo if its not a t25 or t3 flanged

you took the words right outta my mouth