Dorman HELP AC Bypass Pulley 34178 An economical way to get a high mileage vehicle back on the road when an air conditioning compressor seizes A quality part backed by a Dorman limited lifetime warranty An economical way to get a high mileage vehicle back on the road when an air conditioning compressor seizes A quality part backed by a Dorman limited lifetime warranty Meets or exceeds OE specifications for fit, form and function A quality part backed by a Dorman limited lifetime warranty