Your VR6 is a 94 yeah? A lotta 94s come with 280mm brakes.
The usual upgrade that is done is using 288mm calipers with s3 caliper carriers but you also need to use a small spacer. Looks like they have done it with some washers.
Ive got my S3 brake upgrade sitting here waiting to go on my VR6. Im kinda praying they will fit under my 16" Rims. Not expecting them to though.