what size radiator for L67?

[Taranaki]

I looked up a radiator catalogue and it only shows 25 mm thick for the standard Ecotec. Strangely it didn't show size for V8, but I have seen 38 mm thick for the basic 175 kW motor.
So I would guess you need 35 mm for the supercharged donk?

 

[Immortality]

I'd go with the standard V6 (ecotec) radiator. The L67 is after all a supercharged ecotec.

 

[Decicrate]

they only used the ECOTEC radiator as Immortality said, but if you do want to run a bigger one you can use the brass/copper V8 one that was used in the VN/VP/VR