I believe that ESS has a stage for the M54 with an output of 450hp...
If you want a S54 without gambling with luck factor, buy a rebuild one from VAC or other respectable company. Or buy a very cheap or even a light damage engine and rebuild it yourself. Only with these routes you will know how reliable will be the engine and have a peace of mind. 99% of the times by going cheaper, turns to be later into higher costs than doing right at first.
Last edited by Tiago; 01-15-2013 at 11:05 AM.