window balance assembly 500 can be packaged as a cartridge for easy shipping and installation the bridle 504 is connected to the upper end of the carrier 502 at a base or platform portion 512 that nests with projections 514 formed in the upper end of the carrier 39 s 502 housing as shown in fig1 the air dam 508 includes openings or slits 507 and the debris dam 506 includes an opening or slit 509 the slits 507 509 enable the air dam 508 and the debris dam 506 to slide over the legs 516 of the bridle 504 during assembly of the window balance assembly 500 the debris dam 506 is first assembled and is adjacent to the carrier 502 as shown in fig1 the slit 509 is oriented generally perpendicular to the loop portions 518 that are formed at the ends of the legs 516 of the bridle 504 consequently when assembling the debris dam 506 over the bridle 504 the loop portions 518 are oriented parallel to the slit 509 to enable the loop portions 518 to easily pass through the slit 509 in this respect it can be appreciated that the bridle 504 can be made from a flexibly resilient material such as a thermoplastic to enable the legs 516 and or loop portions 518 to be reoriented to accommodate assembly of the debris dam 506 and thereafter return to their original orientation once the debris dam 506 is assembled to the bridle 504 then the loop portions 518 help prevent the debris dam 506 from disassembling from the bridle 504 the air dam 508 is thereafter assembled on top of the debris dam 506 also.