Home > Performance ECU Chips > Ford Cosworth Chips
Stage 3 ECU upgrade chip for the Ford Sierra Sapphire RS Cosworth 4WD with standard YB engine and Level 8 (L8) ECU.
This ECU chip is designed to work with uprated Bosch dark green 803 injectors, T34 or T35 turbocharger and Weber-Marelli 3 bar MAP sensor. With this ECU upgrade your 4WD Sapphire Cosworth will achieve up to 350 bhp.
The following modifications are recommended:
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