SR20 Billet Crank Pulley - What sized belts?

[Feast Japan]

I see all three belts need downsizing after fitting this billet crank pulley. Anyone have the part numbers handy?

[Feast Japan]

Figured it out.

[Def]

So what size belts do you need?

[Feast Japan]

So what size belts do you need?

For 5PK (ALT. Waterpump), used 900 size. And for 3PK (PS) used 875...need to confirm this.

Motor spins up really quick right now, bound to have collected a bit of power with the install.

Cars in for some mapping this Friday night. Running e-manage sub-computer and works pretty good.