1991 Mack R Series Heater Cores
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- Four Seasons®HVAC Heater CoreMack RB600K / RB600S / RB600SX / RD600K / RD600P /... 1991, HVAC Heater Core by Four Seasons®. Products are engineered and tested to provide years of trouble free operation. Backed by over 50 years of mobile A/C experience, fix it once...OE style molded connectorsPrecision engineered$109.35 - $147.87
- Spectra Premium®HVAC Heater CoreMack RB600K / RB600S / RB600SX / RD600K / RD600P /... 1991, HVAC Heater Core by Spectra Premium®. Innovative engineering, manufacturing technology and quality control ensure that Spectra Premium condensers meets or exceeds the...Same quality as OE for less moneyDirect replacement$32.51 - $33.81