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The factory part number was MR420403 (Occasionally we substitute the ECU
The rev limiter has been raised to 7600 rpm
This can be altered on request
23710-05U60
N15 Pulsar
Havok Engineering Nissan S13 SR20DET (Red Top) Stage 1 ECU Upgrade Board CD9A The factory part number wasThe Real Deal Havok Engineering tuned daughterboard upgrade for the Nissan S13 Silvia with an SR20DET Red Top engine. Designed to fit in the factory ECU, these remap the ECU with performance settings. These are available for Manual Transmission cars. Features: Performance tuned fuel and ignition maps The 180 km h speed cut has been removed. The rev limiter has been raised to 7500 rpm. This can be adjusted upon request. The boost cut has been removed.
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