Quote:
Flagg said:

2. I know the power is bumped to 381 bhp, but what about the torque? The standard 997S comes with 400 nm of torque, is that increased at all?



Torque reaches 415 Nm @ 5500 rpm and what is more important torque is continuously staying above 997S without X51 level. See graph below.

Quote:
Flagg said:
3. The Sport Exhaust system will be fitted with the Power Kit as I understand, but if I had the PSE already fitted and then installed the x51, would I notice a difference in the engine sound?



According to German registration documents it is louder.
Standing noise C2S + X51: 102 dB
Standing noise C2S + PSE: 99 dB
BUT same documents for C2S without PSE say
Standing noise C2S: 99 dB
For comparison: 996 C4S + PSE: standing noise 108 dB