there are three variations of the "325" there are the "e" , the plain vanila 325, and the "i". as said, the "i" was not available 'till '87.
the earlier "e" cars were 6 cylinder, 5 bearing camshaft, small intake/port/exhaust/2.5 (i think) t about 122hp. the plain vanila "325" was, i think, available in 86-87 and was an "e" bottom end (2.7) with the "i" big valve/port head but the smaller "e" intake and was rated at about 128hp. the "i" was the big valve/port/exhaust/7 bearing cam motor making 168 hp. the GCR specs two of the cars, the 325 as an ITA car with 2.7 motor only but with small valve head, and the "i" as ITS.
confusing????
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Chuck Baader
SEDIV ITS #36 E30 BMW
Alabama Region Assistant Race Chair, Divisional Registrar