I already have arp hardware and hks 1.2mm head gasket. The car has hks f-con monster intercooler, fcd , full 3-1/2 exh, aluminum csf rad, dual electric race fans, head mildly ported cams cut to a 264 dur, three angle valve job. I have tokico shocks eibach lower springs hks supra sequential. The car always had a code 52. When I finally found out why through my reseach!!!! from A lack of maintance and constant over fuel I developed the dread knock. I brought a 06 cbr1000 and well the supra kind of went on hold. Sorry I have been away for a while but I need turbo again. I guess if I need to uprade the pistons for this number I should just put pistons and rods.