Hey all, Just bought some TTRS/RS3 brembo callipers with the intention of using them on my B7 A4 PD170 Quattro Avant. These seem to be the bargain 4pot brake calipers just now as there is a "product improvement program" (not a recall apparently!) running just now where owners get the callipers, disks ect changed for nowt due to squealing noises. Now there is a consensus that there is really nowt wrong with the actual callipers themselves and its more to do with the fitting of the pads and the discs being made of chocolate so I will leave that debate for other threads/discussion. Anyway there are plenty of these brakes for sale just now at what seems like very good prices so I took a gamble and I am waiting on delivery of these as we speak. As you are probably aware the callipers from mk5 golf, A3, TT, cupras ect mostly fit onto the A4 platform, eg 312mm gti, 345mm R32/s3 callipers all bolt on and with the right A4 disc fitted, jobs a good one! So with this in mind the TTRS and RS3 brembos should physically bolt up to the B7 hubs. The TTRS/RS3 set up use's a 370mm disc. But the offset and centre bore of these discs are wrong for the A4 so that rules out using the original 370mm disc on the A4. Now the B7 RS4 on the other hand uses a 365mm disc so in theory if I had 2.5mm removed from the calliper carrier bracket and the mounting bolts to pull the calliper in that should allow the use of the oem RS4 disc. I say in theory because the offset of the 370mm carriers once bolted to the A4 hub could be out of line for an oem A4 disc anyway. A 365mm disc is way overkill for this car and they are expensive but if this can work I would not have to have calliper brackets made so that could outweigh the extra costs? The Rs4 discs would be lighter than 320mm/345mm discs aswell so that would be a bonus. If I need to have brackets made up I will probably just use 320mm (DTM/all road) Discs or the 345mm(S4)discs. Because the Pistons are different sizes I will need to swap round the bleed screws and balance pipe on the callipers because they will be mounted upside-down on the A4. This is also to ensure the smaller piston remains on the leading side of the disc. Just like when fitting Q7/Toureag brembos. Any thoughts on this? I have searched all over google ect and not found any definitive answers on these being fitted to an A4 so I thought I would take the plunge!!