MASTERCOOL 91337 Valve Core Repair Kit with Installer Tool

The MASTERCOOL 91337 is a professional-grade Valve Core Repair Kit designed for servicing automotive A/C systems using R12, R134a, or R1234yf refrigerants.

This comprehensive set includes a universal valve core remover/installer and a full assortment of valve cores for domestic and import vehicles. Organized for quick access, it’s ideal for shops that perform frequent A/C service across a wide range of platforms.

Key Features:

• Compatible with R12, R134a, and R1234yf systems
• Universal valve core remover/installer included
• Supports domestic and import valve configurations (JRA, Eaton SSV, GM)
• Perfect for A/C service bays and mobile repair operations

Includes:

• 20 × 0377-001 – Standard Access Valve Core
• 10 × 0378-001 – GM Large Bore Valve Core
• 10 × 0531-001 – JRA Import High/Low Valve Core (M6)
• 5 × 0769-001 – Eaton SSV High Flow Valve Core (M10)
• 5 × 0768-001 – Eaton SSV High Flow Valve Core (M8)
• 1 × 81290 – R12/R134a/R1234yf Valve Core Remover/Installer Tool