You are correct that the instructions for the Curt hitch do require 4 bolts on each side, making that a total of 8 bolts for installation.
Both of the hitches have been designed and tested for the weight capacities listed. Curt warranty does require the use of a stabilizing strap like part # 18050.
The # C11132 and # 24759 are both Class l hitches with 2,000 lb towing capacity and 200 lb tongue weight capacity.
I spoke with my contact at Draw-Tite and they told me the reason for using... view full answer...
Both the Curt T-Connector Vehicle Wiring Harness, part # C55532 and the Hopkins Vehicle Wiring Harness, part # HM11142435 will serve the same purpose and install on your 2009 PT Cruiser in the same manner.
Over time, we have had more responses from customers that are more favorable toward the Curt # C55532.
I have attached links to installation videos for both of these harnesses you can check out. view full answer...