[racer]

'74-77 911S / US Carreras used the 2.7l CIS injected motors. Rated between 157-167 depending on year (74s had no emission controls and were rated at 167 SAE hp. 75-77 were rated at 157 and iirc, Cali models might have even been dinged a little more.)

Rare? hardly, but overall, even the lowly midyears are going to have their day. Overall not many were built and seems many were modded up/converted to track cars. Finding original, UNMOLESTED concours examples are hard to come by.