my 2001 Audi A4 is stock, i want it to have around 300HP, what kinds of mods should i do to achieve that?

 

Assuming you don't follow the steps I outlined in your other post, and you decided to keep you A4, your best bet for 300 HP is to contact Mike at Ringer Racing

You're looking at a GTRS eliminator set up with a ton of supporting mods like a front mount intercooler and upgrades to the clutch to handle the extra power, plus brake and suspension upgrades to keep you from crashing it.

Enjoy.

 

Well thats quite expenive, i think i might just do a S4 engine swap instead. But do you know what other things i would need if i wanted to keep my A4 but do a S4 engine swap?