You drive a Spectra right?.. I would suggest a larger turbo.. Probally something like a GT2876R or even a GT3071R. The GT25BB is not really a new turbo it was Garretts first real attempt at ball bearings.. The new GT series turbo with ballbearings are much more effeciant, plus the GT25BB is really rather small.. It would be a good upgrade for a 3 cyl firefly but not anything larger then a 1.6. I'm using a GT2560R and I love it.. And lowering the compression with pistons is a much better bet then stacking or installing a thicker head gaskets, both will lead you into problems.. And by replacing the pistons you will have a better look inside the engine and have the chance to freshen it up a little, new rod bolts, bearings, oil pump etc etc.RioTuner.....how much boost are you running and what are your numbers? I plan on using the new Garrett GT25BB turbo and the Tigerlilly pistons instead of the compression gasket.