engine (long block and cylinder head) and 1:3.75 ratio 25% limited slip rear differential from a 1988 325is with 73k miles (have sequential service records for car that verifies the mileage). both the engine and the differential are in great working order and are currently in the original well-running car (I will be taking them out to replace them with a high performance engine. asking $1,500 for the engine and $500 for the rear differential. also have a transmission from a 325 that is excellent condition with low miles for $700. prices are negotiable.