This link will give you a rough idea of what power is available when modding the RS4,
http://forum.rs246.com/viewtopic.php?f= ... ilit=441ps
1) 441ps, Sonny, BMC filter, Full Milltek (non res 200cell cats), Manifold, Remap and valves cleaned, MRC
2) 451.5ps, 484Nm, Sar, itg filter,milltek cat back non res,original oem cats with pre cat removed,manifold,remap,valves cleaned,mrc.
3) 445.6ps, 479nm Brooner MRC filter manifold ported valves cleaned custom remap oem exhaust H&R anti roll bars MRC magic
4) 417.4ps, N11LS_J, K&N filter, Custom RS Fabrications system with 3" De-Cat pipes, Paramount Custom map, Hotchkis ARBs and H&R springs.
5) 395.9ps, 461nm, rs4mikek, freelow filter, Full Milltek with 100 cell cats, custom remap, all work done by MRC (manifolds and valve Cleaning not done yet)
6) 442ps, 471Nm, RSsJs, MRC filter, Full Milltek (non res 100cell cats), manifold, remap and valves cleaned, MRC and Sachs performance clutch.
7) 464.7, 513Nm, thdoluk, ITG, Milltek catless DP's and res exhaust, clean valves, ported manifold, cold air feed and MRC remap.
8 ) 539ps, 570 NM, larshs, MTM supercharger, MTM exhaust, MTM clutch, MTM flywheel
9) 528ps, 601Nm, DannyRS4, Supercharger, Full Milltek, Sachs Clutch/FW kit, MRC Remap
10) 461ps, 491Nm, Doug_S2, MRC Filter, Full Milltek, no cats, Ported/cleaned, cold air ram intake, MRC Remap
Just got back from MRC where they have worked some more magic on my car, now up to 464.7, 513Nm from 442.2, 479Nm.
The increase in low down torque is very noticeable. Doug said it's the most powerful one he's done so far. To say I'm happy is an understatement.
Big thanks to all the boys at MRC especially Doug.