just wondering what possible engine swaps could be done to the 1.8t a4.....possibly with the 4.2L s4 or would the bi-turbo 4.2 rs6 fit...any others..../thanks for the help//

 

the 4.2 will fit on the b6/b6.5 model.....when i was in europe my cousins freind had the b5 rs4 with the 4.2 biturbo rs6 motor tuned to over 500 wheel horsepower, i think it was like 537, i didnt beleive him until i saw the dyno sheet, sounds crazy - i know.