Off top of my head i cant remember size or make but they were the largest i could fit to a standard rad I.E fitted at opposite corners (left 1 is higher and right is lower ), i remember making cardboard cut outs and placing them on the rad to see how what size could be fitted
Do you think you could find out for me next time you have a chance? Id be major grateful
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Ex- Phase 3 China GTi-6 T-Reg