Just unscrewed the stock one from my old radiator and bolted to it to the new one? Did have any problems. clearance around the fan/GS-R AEM CAI/overflow bottle was tight, but it all fit.
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Andy - Reinstated
Hybrid Forum Moderator
'06 Subaru Legacy Spec B - Stock, for now
'98 Civic EX - CTR headlights and grill, Kosei K1's, for sale
'90 240SX - SR20DET that will never get installed, project car.