I need to replace my spark plugs. I'm thinking of changing the plugs as well but the local auto parts doesn't carry the OEM. One guy recommended MSD Universal ignition wires.

Can anyone tell me if they would work better on Audi?
Can I just replace my plugs and not the wires (noticeable difference)?
What size does a 96 A4 Quattro take (8.5)?

Thanks in advance
. yves (:.