When you buy this...
Circuit Sports S13 SR20DET Turbo Lines (Bottom Mount) (http://phase2motorsports.stores.yahoo.net/cisps13srtul.html)

It comes with an UNrestricted oil inlet. But i have to buy a restricted one. But the site does NOT say what AN size the oil line is. (-3 or -4)

So im at a loss which one i need to buy

Does anyone know?

-3 size Oil inlet fitting for GT28/30/35R with built-in restrictor: atpturbo.com (http://www.atpturbo.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=tp&Product_Code=ATP-OIL-036&Category_Code=BCS)
-4 size Oil inlet fitting for GT28/30/35R with built-in restrictor: atpturbo.com (http://www.atpturbo.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=tp&Product_Code=ATP-OIL-021&Category_Code=BCS)

if you are using them in a FWD those lines will be too short. Just make your own kit. its much better.

I dont know enough about AN lines and fittings to make my own

its not hard. You can get the Go Fast Depot oil feed. and just find the lenghts of hoses you need and find what fittings go into the turbo.

The only oil feed i see on gofastdepot is for the DE.
And the shortest line atpturbo.com has is 3 ft