[Vasan76]

I've been trying to find a Single Turbo Kit for the 2009 Audi S5 4.2 but all of them are above like $13k USD and barely have any info. Has anyone done more research or done a Single Turbo Setup for their S5?

 

[SimonRoma]

Vasan mate, I think that yours is not really a good idea. I vote to leave the poor old V8 as she is or trade her in for something more powerful. The normally aspirated V8 is a truly stunning engine and has power and torque to spare. The turbo cars have very different characters and of course engines. If a V8 engine gains a turbo then it generally gets TWO, one for each bank, cos otherwise she will never be balanced. AND if you ever were to turbo a non turbo engine I think that you will very quickly hit the law of diminishing returns in other words everything will need upgrading or break.