Dinan performance chip D900-2550-E for 93-95 325i(S)/525i(T) with m50 vanos. Will fit Bosch ECU #0-261-200-413 (with "-623" stock chip" This is complete with instructions and all documentation. I purchased this for my 95 525 but I have a very late production date with a different ecu, I did not want to chance anything. I can fax the instructions If interested their are some other numbers on the ecu that must match. First $120.00 with shipping takes it. Thanks Marty