Brand new 3.73 diff, never installed. Shortens the final drive gear ratio for quicker acceleration throughout the entire powerband. Retail is $1975 from BMW, asking $400 or best offer. Fits all 525/530/535 models with 2.93/3.46 diffs.

 

what does this do for the bmw. Do it make better or what. Please explain

 

Hi,
Can you tell me if the gears in this diff will interchnge with an E39 6cyl? My ride is an '02 530i auto with the standard 3.46 ratio.
Cheers.

 

Obviously, does not fit an Xi - correct?

 

lol stop answering ur own questions xi's get no aftermarket love


a better question would be what does this do for gas mileage? i would imagine not as good