hmm...why? i buy this engine because this is HARTGE M30B28. this engine is't popular on e30 , early i've m20b27 after tuning like some engine in e30.de but that b27 i finish in 3 months :( M30B28 is more enduring for hard driving. ok my problem is can't find anywhere some like this http://www.behindmatrix.com/e30/fotost/f00103/f00103.htm but to my engine. m30b28(84r) adapterkabel m20b20 (89r) because those from e30.de is't match to my engine:((( btw.now i know this two site is difrent:) thx for fast answer:)and i waiting for help... 9