I am currently parting out a B5 S4 and I have a relatively new RS4 clutch installed on it and I was wondering if it would be possible to use this on a 1999 A4. They are both Quattro and MT. I have seen a RS4 clutch for sale but it had slight alterations in it to make it fit a A4. Any info is greatly appreciated thank you.

 

The only way to make it work is to use a custom flywheel, ECS and Spec both make that flywheel but tend to only sell it in their full kit.

Little info for you.
S4 uses a 01E transmission and a 240mm clutch setup
A4 uses a 01A transmission, the 1.8t uses a 224mm clutch setup


S4/RS4 pressure plate is cut for a flywheel that is perfectly flat, while the A4 flywheels have a lip for the pressure plate to sit on. There is way less room between the A4 block and the 01A bell housing then there is in the 01E S4 transmission.

 

Well say i was to able to a custom flywheel, would there a be a way to make this fit?

 

I am sure there would be, but you need to get the height exactly right or you will have an issue with the slave.