Upgrade your Holden Commodore or Calais VY 3.8L V6 Supercharged cooling system with the Mackay Upper Radiator Hose (Part Code: CH3347) — the ultimate direct-fit replacement designed to meet or exceed original equipment standards.

Crafted from premium EPDM rubber reinforced with a tough rayon-knit structure, this top radiator hose delivers exceptional durability and resistance against high temperatures (from -40°C up to 125°C), chemical exposure, ozone, and electromechanical wear. Its robust construction ensures maximum protection against bursting and maintains optimal coolant flow under heavy pressure, keeping your engine running cool and efficient.

Key Features:

• Genuine Mackay quality, ISO certified and SAE J20R4 Class D-1 rated for outstanding performance and reliability
• Precision-engineered fit for Holden HSV Grange WH 3.8L (Pipe to Radiator Upper Hose position) from VIN 3L920580 onwards
• Inside diameters tailored for exact OEM fit: 30mm one end, 33mm the other
• Durable 400mm length for perfect hose routing and installation

Mackay: Trusted Australian Craftsmanship

With over 85 years’ heritage in Australian automotive manufacturing, Mackay has set the benchmark for quality and innovation—from bonding rubber to metal on the original FX Holden to supplying parts for the last VF Holden. Manufactured in Melbourne and trusted worldwide, Mackay products deliver uncompromising quality and engineered excellence every time.

Please Note:

Do NOT use this hose for HSV Grange WH 3.8L VIN numbers before 3L920580, as fitment is not guaranteed.

Ensure optimum performance and durability for your Holden with the Mackay Upper Radiator Hose — order today and drive with confidence knowing your cooling system components are backed by Australian expertise!