I know for a fact that there was a redtop with headfins as i owned one. It came in a front clip from a 180sx that was dated 1993 on the vin tag. The ecu was the redtop ecu and not the blacktop ecu. I got the motor back in 2004 as my first sr swap. still have pics if ud like me to post. I owned the motor for over 5 years and put over 60,000 miles on it. Great engine!
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