found this in the current "DRIVE!" magazine;

450 hp/2000/2001 Subaru factory test engines.  DOHC, single or twin turbo,
4 valve, pent (combustion chamber) roof heads.  Like new, low hours of test
time, 5 main bearing - horizontally opposed.  Single turbo w/black box
$1,895; twin turbo $2,295.  Comparable engines selling at $10k and up (race
ready comp. engines)  510-889-7845  (Northern CA - east bay)

Austin