X51--I can't remember what it's got....
 

I'm looking at an 04 C2 with X51, but can't remember what's involved with it; can someone help? I recall this being an expensive option, and I assume it's desirable. Thanks in advance...

bumps the power to 345hp, from 320hp... is this the 40th ed?

No. A late production 996 Cvt...
 

is it just engine? No brakes, etc.?

Just engine....new heads, intake, ECU, cams, etc...

very desirable option. also a rare one.
all the 40th anniversary models came with the X51, but you could order it separately.

whatever he said ^^^^^

You also asked about price. On my 03 invoice it was a $13,990 option.