would like to know if i am right in thinking that my v3 sti should have a 6S ecu ?

the engine was swapped earlier in the year for a v4 engine and another ecu but he didnt know the number of the ecu when i asked him

i suppose i will lose out on the v3 heads with the more aggressive camshafts but anyway a v4 engine will do ( piston slap is murder in the morning though )

anyway 6s 3-pin am i right ???

 

Yes, thats right mate. A v4 should have a 75 ecu.