what rad should i be using it a new indy(think same rad as normal indy fits)

ive heard people say polo but does anyone have any years / engine sizes etc.

Thanks.

Polo rads are the most popular because they are cheap, plentiful and compact.
It cools my 2.5L V6 ok too

I have K10 Micra rad, fits nicely and cools R1 no problem.

I'm using a Polo rad on a supercharged 1.6 engine. I've got a large intercooler in front of the rad and so far its all working nicely. I've not had a really hot day yet to test the fan yet though.

VW302 part no. polo rad fitted ot mine, nice snug fit.

try radiators on line for a reasonable price

hope this helps