you can put a surge tank into a stock tank or approved fuel cell. that's pretty clear to me. an external one is less so.

I'm also interested to see what people think as my ITB 1983 VW GTI has a surge can + added extrnal fuel pump which is the primary feed to the CIS. I got the car this way as payment for a motor build and haven't gotten it on track yet. it's not my primary concern, but i have thought about the legality of such a system. it's all enclosed in sheet metal but the surge can is pretty obvious as to what it is.

anyone want an 83 rabbit GTI with 1994-issued logbook? fresh trans!