anyone happen to know of advantages of the RS2 intake mani vs the 3B or AAN?
The ADU is the 315hp 20vt found ONLY IN THE RS2. At least from the factory. Porsche DID revise the ABY's intake manifold, cleaned it up a bit for a slight gain in flow. They increased the boost pressure, put a larger turbo on it, larger injectors, new tune for the ECU, small things like that.
VAG 5cyl 20vt usage in street cars:
KW - SQ - 304hp
RR - urq - 220hp
3B - 200q20v, S2 - 217hp
ABY - S2 - 228hp
AAN - S4, S6 - 228hp
ADU - RS2 - 315hp
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