Description
The ARM Motorsports MK8 Bi-Cooler Upgrade is engineered to allow simultaneous use of the ARM MK8 Front Mount Intercooler and the factory intercooler, or any upgraded OEM-location intercooler that retains factory charge-pipe routing. This configuration creates a true bi-cooler system, significantly increasing total charge-air cooling capacity while preserving OEM-style fitment and drivability.
Designed as the ultimate cooling solution for the MK8 platform, the ARM MK8 Bi-Cooler Upgrade improves thermal efficiency under sustained boost, aggressive driving, repeated pulls, and track use. By utilizing a dual-intercooler strategy, intake air temperatures are reduced, cooling consistency is improved, and heat soak is minimized during high-load operation.
Key Highlights
• Allows utilization of both ARM MK8 FMIC and OEM intercooler
• Compatible with upgraded OEM-location intercoolers using factory routing
• Improved cooling capacity and thermal stability
• Reduced intake air temperatures (IATs)
• 6-layer reinforced silicone construction
• Includes constant-tension T-bolt clamps
Dual Intercooler Cooling Strategy
By combining the ARM MK8 FMIC with the factory intercooler, the bi-cooler setup increases total heat exchanger surface area without sacrificing airflow efficiency. This design allows charge air to be cooled progressively, resulting in lower and more stable intake air temperatures during extended high-boost operation.
Testing has shown that when paired with the ARM MK8 FMIC, the bi-cooler configuration maintains intake air temperatures close to ambient even under demanding driving conditions.
Hose Construction & Pressure Capacity
The ARM MK8 Bi-Cooler Piping Upgrade is manufactured from premium 6-layer silicone reinforced with internal steel wire for maximum strength and durability.
• Rated for boost pressures exceeding 50 psi
• Resistant to heat, pressure, and deformation
• Maintains structural integrity under extreme conditions
To ensure a secure, leak-free seal, the system includes constant-tension T-bolt clamps that maintain consistent clamping force throughout heat cycles and high-boost operation.
Optimized Diameter & Flow Characteristics
Throughout the entire system, the bi-cooler piping maintains a consistent 2.5-inch inner diameter.
• Maximizes airflow volume
• Preserves charge-air velocity
• Supports strong throttle response
• Ensures efficient turbocharger operation
This sizing balances airflow demand with response, making it ideal for both street-driven and high-performance MK8 builds.
What’s Included
• 2x ARM MK8 bi-cooler silicone hoses
• 6x constant-tension T-bolt clamps
Fitment Guide
Compatibility Notes
• Designed specifically for use with the ARM MK8 Front Mount Intercooler
• Requires OEM-style charge-pipe routing
Vehicle Compatibility
Volkswagen Golf VIII GTI
• Body Style: Hatchback
• Engine: 2.0T EA888 Gen 4
Volkswagen Golf VIII R
• Body Style: Hatchback
• Engine: 2.0T EA888 Gen 4
Warranty
Every ARM Motorsports product is backed by a lifetime warranty covering defects in craftsmanship and fitment. Warranty coverage is automatically issued at the time of purchase and entitles the owner to a replacement unit if necessary.
