| Y1s were only made for the EF8 and EF9, all facelift DA6 and DA8 had the YS1, LSD was still an option. A1 boxes are taller geared for the non VTEC motors.
Chassis codes DA6 10XXXXX S1
DA6 11XXXXX J1
DA6 12XXXXX YS1 (facelift)
The only boxes to have a LSD option was the Y1 and YS1, if you have a DA with a Y1 then its been swapped at some stage as a lot have been by now :wink:
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EF Civic B series N/A best E.T 12.46@178km/h
EF CRX B series N/A best E.T 11.83@186km/h
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