Mastercool 66661-AYF R1234yf/R134a Dual Brass Manifold 3×60" Hoses

The Mastercool 66661-AYF is a professional dual refrigerant brass manifold gauge set designed for both R1234yf and R134a automotive A/C systems. This complete kit includes everything needed to service modern and legacy automotive air conditioning systems.

Complete Kit Includes

• 2.5" silicone dampened gauges — Recalibratable for long-term accuracy
• 3× 60" R134a standard hoses — Extended reach for easier access
• R1234yf quick couplers — High and low side (67434, 67534)
• R134a economy couplers — High and low side (66234, 66334)
• 1/2" ACME adapter — M×F LH thread (83633)
• 2× R1234yf adapters — 12mm-M × 14mm-F (83735)

Key Features

• Dual refrigerant compatibility — Service both R1234yf and R134a systems with one manifold
• Extra access port — Dedicated vacuum line connection
• Silicone dampened gauges — Smooth needle movement and accurate readings
• Recalibratable gauges — Maintain accuracy over time
• Brass construction — Durable manifold body
• Complete adapter set — Ready for both refrigerant types
• 60" hoses — Extended length for better reach and flexibility

Technical Specifications

• Gauge Size: 2.5" diameter
• Gauge Type: Silicone dampened, recalibratable
• Refrigerants: R1234yf and R134a
• Hose Length: 3× 60" (152cm)
• Hose Type: R134a standard
• Manifold Material: Brass

Related Products

• 66636-AYF — Same manifold with 3×36" hoses
• 66672-AYF — Same manifold with 3×72" hoses
• 85500-AYF — 2.5" high side replacement gauge, R1234yf/R134a
• 85350-AYF — 2.5" low side replacement gauge, R1234yf/R134a

View our complete range of manifolds and gauges for professional HVAC/R service solutions.

Essential equipment for automotive A/C technicians servicing both modern R1234yf and legacy R134a systems.