New to Subaru as well as this forum. I own a 1999 Subaru Impreza WRX, Japanese spec, 165,000. Going to buy a new clutch soon, stage 1 or OEM. Any recommendations. Also 75W-90 for Diff / gearbox? 

Hello & welcome,

 

What kind of power are you putting out, exedy blue box kits will suffice up to about 300bhp anything over that and you'll need a pink box kit,

Factor in for a spigot bearing flywheel skim and possibly a rear main oil seal as if it's looking tired or weeping slightly it's best to change it while it's all apart, no point ignoring it then having to replace the clutch again once it's spat oil all over it.

 

As for oils most of us Miller's oils but any decent 75/90 oil will be fine.

One word of advice (sorry if I'm teaching you to suck eggs) open the fill hole before the drain one,

 

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Thank you very much Sir/Ma'am for the feedback and your time as well. I am new to working on cars but not that new lol.