Are the rear rotors on a B7 S4 the same........

[4 black rings]

Are the rear rotors on a B7 S4 the same as the rear rotors on a B7 A4. I am looking to get the JHM BBK Kit and need to know if they are the same size as they werent sure. Thanks

[agkellyboy]

No, the S4 has 300 in the rear compared to our 288. ECS has an upgrade kit that includes all the hardware. Here (http://www.ecstuning.com/Audi-B7_A4-Quattro-2.0T_FSI/Braking/Big_Brake_OEM/ES6282/)

[4 black rings]

Can anybody else confirm this?

[quattrosaint]

Can anybody else confirm this?

That is correct plus the S4's are vented and the A4's are solid.

[Matt@EuropaParts]

Yep, 300mm vented (S4) vs. 288 solid (A4)

[4 black rings]

So then I take it that I can't use the JHM rear rotor kit from an S4 with out buying a lot of extra parts or can I just buy the carriers? Wanted to buy locally and have them install it but they only have S4 rear rotors that match the fronts. What should I do?

[Quattro]

if you want the rear kit, you will need to buy the necessary stuff....

no way around it, sadly...I wanted to do this upgrade