Stock internals will hold a stage 3 apr kit. And thats factory 20-22lbs of boost. Puts them around 4-500hp awd. Not bad for a 5 grand upgrade. You can get meth kits and of course upgrade internals and create retarded power. I know 034motorsports in Cali are some of the leaders in the high HP cars. They have a A4 with a VR6 motor/ R32 head with a GT42RS. Pumping out 900hp awd. I know you can buy like gt25 all the way through gt2871r's. And make from 550-800hp. And not have to do to much to the motor's to get it there neither. If boki ever comes back on, he knows a shit load more about the 2.7 motor then I do. I know more about the 1.8t motors then the 2.7Bi-turbo motors.
EDIT:
Did some homework and found that there is people running 6--hp on stock internals on the 2.7 before they start to do rods and head work. There is a guy named Billy in Texas running 500hp on a FWD a4 1.8T with stock internals. And they are making 7-800hp on stock bottom ends.
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