I used this $55 HHR fan in my Firebird. It stood up to stop and go traffic in southern California on a ~90-95ºF day. Just minor trimming as needed to clear everything.

Can't beat the price, but if I had the option of a two speed fan I'd go that route. A low speed fan setting continuously on during the stop and go traffic probably would of worked just fine as this fan was cycling on and off at regular intervals. It comes on at 205ºF and off at 185ºF, so was very efficient at dropping the engine temp 20ºF when on.

http://www.amazon.com/TYC-621450-Chevrol...eywords=HHR+Fan