hi nige i am changing all tensioners and guide pulley as a precaution as well as the water pump. the ones on my 2.5 were ok no play not nosiy but not worth the risk.
as for head gaskets going for 1.6mm and been told to aim for 8.35:1 compression ratio
i am going for 1-5 ppg straight cut box and a OS Giken twin plate clutch (comes with its own flywheel)
aiming for the 500 mark but anythink over 450/450 with quick spool is my main aim.
my next steps will be sorting my sti heads out new valves/springs/retaners/ and port and polished/ shimed up. going for dh22 cams and rcm pullys
