HKS 21200-D136T VPC ROM Microchip for Vein Pressure Converter

The HKS 21200-D136T VPC ROM is a vehicle-specific, application-tuned ROM microchip designed as an upgrade for the HKS VPC (Vein Pressure Converter) fuel management system. This ROM chip allows the VPC to accurately compensate for upgraded fuel system and forced induction components, ensuring precise and reliable fuel delivery.

Key Features:

• Vehicle-specific fuel map programming tailored for the Mitsubishi Eclipse GST/GSX Turbo (1989–1994)
• Calibrated for a specific injector size, fuel pump, camshaft, and/or turbo configuration to calculate the correct injector pulse width
• Replaces or upgrades the factory ROM inside the HKS VPC unit for enhanced tuning capability
• Enables the VPC to take full advantage of larger, higher-flowing HKS fuel injectors and/or upgraded turbos
• Prevents driveability and reliability issues associated with running larger injectors or turbos on the factory fuel map
• Compatible with the HKS VPC speed density fuel management system operating on a 16-bit central processing unit

The HKS VPC ROM chip is a critical tuning component for turbocharged builds using the HKS VPC system. Since the VPC piggybacks the factory ECU, all OEM systems remain intact and operational. Fine-tuning of fuel curves can be further achieved by pairing the VPC with the HKS GCC or Super AFR. This ROM is specifically matched to the D136T tuning level — always verify your VPC unit and injector setup before selecting a ROM chip.