tassiegti on paper you may think theres not alot of diff between the 2 engines...from my experience with both engines in stock and modified combos the abf blows the door handles off a stk 16v...the preformance potential of the abf normally aspirated is up to nearly 200kw thats over 270hp..of course the internals are also heavily modified tio acheive this result. at this point the stk g/box has already cried enough!!!!!, as the sounds of marbles in a tin can echo in your ears,, the stk box is good for 200-240hp..its the other parts of the drive line which also suffer cv's ,uprights, wheel bearings etc.have to think what ABF stands for absolute bum?????? cheers steve